Merge pull request #14773 from rwalton-arm/move_platform_stub ...

Move mbed-stubs-platform to the platform directory

Merge pull request #14884 from LDong-Arm/rm_UNITTEST_macro ...

Remove the `UNITTEST` macro from production code

Merge pull request #14835 from ARMmbed/move_stubs_cellular_headers ...

Move stubs cellular headers

CMake: Move netsocket stub headers to the netsocket doubles dir ...

Previously all the netsocket stubs headers under mbed-stubs-headers,
so this PR move all netsocket stubs headers under
netsocket/tests/UNITTESTS/double directory and update CMake to include
stubs headers into mbed-stubs-netsocket library to make netsocket stubs
to be self-contained.

CMake: Add mbed-headers-netsocket headers library ...

- Previously, all netsocket headers made as a part of the
mbed-headers-connectivity library. To make it easier to separate all
the netsocket headers into the separate mbed-headers-netsocket library
and keep them, as part of netsocket stubs CMake. This makes the
netsocket stubs more self-contained and improves the composition of the library.
- Update cellular, netsocket unit tests to link only with a mbed-headers-netsocket
library that it depends on instead of link with mbed-headers
which is a group of headers libraries.

CMake: Move netsocket stubs to the netsocket dir ...

Move the connectivity netsocket stubs into the connectivity/netsocket
component directory. So we can avoid duplicating the mbed-os source
tree in a central UNITTESTS folder.

Merge pull request #14842 from ARMmbed/move_connectivity_lora_stubs ...

Move connectivity lora stubs

Unit tests: Update <mstd_type_traits> stub ...

The stub version of <mstd_type_traits> is mostly identical to the
production file of the same name, except the former lags behind
and doesn't contain the recent "is_constant_evaluated" feature.
It's safe to update the stub file, because "is_constant_evaluated"
only checks generic GCC and Clang versions that also apply to
compilers on PCs.

This enables MbedCRC.h to include <mstd_type_traits> without
distinguishing between Mbed applications and unit tests.

Unit tests: Remove `#ifndef UNITTEST` from the mbed_assert.h stub ...

The stub version of mbed_assert.h is never used outside unit tests,
so the check on `UNITTEST` is redundant.

CMake: unit-tests: Split platform headers out of mbed-stubs-headers ...

We have a central collection of "stub headers", which makes reasoning
about dependencies rather difficult, as it forces every stub library to
depend on all available stub headers. The standard approach would be for
each stub library to expose its public headers, and its dependents to
explicitly specify a dependency on the stub library containing the
headers it needs. This is a more modular design than creating a
header-only monolith library. Move the platform stub headers from this
central library into the mbed-stubs-platform library to increase
modularity.

mbed-stubs-connectivity now depends on the mbed-stubs-platform because
it requires some headers which were moved to mbed-stubs-platform.

CMake: unit-tests: Move mbed-headers-platform to platform directory ...

Move the header-only mbed-headers-platform library the unit test stubs
depend on into the platform component directory. This makes the platform
stubs more self contained and improves composition of the library.

CMake: Move platform stubs to the mbed-os/platform directory ...

Move the platform stub library into the platform component directory.
This change is so we can avoid duplicating the mbed-os source tree in a
central UNITTESTS folder.

Unit tests: Remove mbed-headers-storage

Unit tests: Create mbed-headers-kvstore ...

Create a CMake target mbed-headers-kvstore to separate KVStore headers
from the generic mbed-headers-storage. Update tests to use it.

Unit tests: Create mbed-headers-filesystem ...

Create a CMake target mbed-headers-filesystem to separate FileSystem
headers from the generic mbed-headers-storage. Update tests to use it.

Unit tests: Create mbed-headers-blockdevice ...

Create a CMake target mbed-headers-blockdevice to separate BlockDevice
headers from the generic mbed-headers-storage. Update tests to use it.

CMake: Move cellular stub headers to the cellular/tests/UNITTESTS/double dir ...

Previously all the stubs headers under mbed-stubs-headers,
so this PR move all cellular stubs headers under
cellular/tests/UNITTESTS/double directory and update CMake
to include headers into mbed-stubs-cellular library to make
cellular stubs to be self-contained

Move storage stubs into subdirectories of Mbed OS storage ...

Move storage stubs from UNITTESTS/stubs into components inside the
top-level storage directory. Specifically,
* storage/blockdevice/tests/UNITTESTS/doubles/ for BlockDevice stubs.
* storage/kvstore/filesystemstore/tests/UNITTESTS/ for a stub used by
the FileSystemStore test. The stub has been renamed from
kv_config_stub.cpp to filesystemstore_kv_config_stub.cpp, to make it
evident why it doesn't go into storage/kvstore/kv_config/.

Unit tests: Remove unused EmulatedSD

CMake: Move lorawan stub headers to the lorawan/tests/UNITTESTS/double dir ...

Previously all the lorawan stubs headers under mbed-stubs-headers,
so this PR move all lorawan stubs headers under
cellular/tests/UNITTESTS/double directory and update CMake to include
stubs headers into mbed-stubs-lorawan library to make lorawan stubs to be self-contained

CMake: unit-tests: Add mbed-headers-lorawan headers library ...

Previously, all lorawan headers made as a part of the
mbed-headers-connectivity library. To make it easier to separate all
the lorawan headers into the separate mbed-headers-lorawan library
and keep them, as part of lorawan stubs CMake. This makes the lorawan
stubs more self-contained and improves the composition of the library.

CMake: Move lorawan stubs to the lorawan dir ...

Move the connectivity lorawan stubs into the connectivity/lorawan
component directory. So we can avoid duplicating the mbed-os source
tree in a central UNITTESTS folder.

CMake: unit-tests: Move mbed-headers-hal to the hal directory ...

Move the header-only mbed-headers-hal library the unit test stubs
depend on into the hal component directory. This makes the events
stubs more self-contained and improves the composition of the library.

CMake: Move hal stubs sources to the mbed-os/hal directory ...

Move the hal stubs into the hal component directory.
so we can avoid duplicating the mbed-os source tree in a central
UNITTESTS folder.

CMake: unit-tests: Add mbed-headers-cellular headers library ...

- Previously all cellular header made as a part of the
mbed-headers-connectivity library. To make it easier to separate all
the cellular headers into the separate mbed-headers-cellular library
and keep them as part of cellular stub CMake. This makes the cellular
stubs more self-contained and improves the composition of the library.
- Update all unit test that depends on cellular headers with mbed-headers-cellular library

CMake: Move connectivity/cellular stubs to the mbed-os/connectivity/cellular dir ...

Move the connectivity cellular into the connectivity/cellular component
directory. So we can avoid duplicating the mbed-os source tree in a
central UNITTESTS folder.

Merge pull request #14819 from ARMmbed/move_rtos_stubs ...

Move rtos stubs to the rtos directory

Merge pull request #14716 from boraozgen/at-handler-buffer-size-config ...

Cellular: Add AT handler buffer size to configuration

CMake: unit-tests: Update connectivity stubs and their unittests ...

mbed-stubs-connectivity now depends on the mbed-stubs-rtos and
mbed-stubs-rtos-headers because it requires some headers and sources
which were moved to mbed-stubs-rtos and mbed-stubs-rtos-headers.

CMake: unit-tests: Move mbed-headers-rtos to the rtos directory ...

Move the header-only mbed-headers-rtos library the unit test stubs
depend on into the rtos component directory. This makes the rtos
stubs more self-contained and improves the composition of the library.