hal-tests-tests-mbed_hal-flash compilation warning

Add platform MTS_DRAGONFLY_L496VG

Unit tests: Add stubs for analogin_api.c functions ...

Currently there are no stub implementations of the analogin_api.c
functions. As the AnalogIn class makes use of these functions, these
stub definitions are required in order to build AnalogIn.cpp and
generate .gcno files to be used to generate code coverage metrics.

CMake: Add option to enable greentea tests ...

Add an option to enable the greentea tests independently from the unit
tests.

We can't just use the typical BUILD_TESTING option to enable greentea
tests. BUILD_TESTING enables unit tests and fetches googletest, which
are compiled for the host. Greentea tests are cross compiled and require
a toolchain file. For this reason we add a new option just to enable
greentea tests, preventing build failures triggered by the unit tests
and googletest.

Unit tests: Fix pin validation failure ...

The test script pinvalidate.py requires the following which are
missing in the unit test stub PinName.h:
* A comment "MBED TARGET LIST"
* `CONSOLE_TX` and `CONSOLE_RX` in the `PinName` enum

This commit adds them.

Unit tests: Remove redundant CMake target mbed-headers-base ...

Individual libraries' `target_h` stub headers have now all been moved
from `mbed-headers-base` to `mbed-headers-<library>`.

Note: Even though headers previously in `target_h` are technically
stubs/fakes too, they are used by not only unit tests but also regular
libraries when compiled for unit tests, because no target-specific HAL
implementation exists in this case. In order for regular library
sources to pick up `target_h` headers, those headers must

* have the same names as regular headers
* appear first in include paths

This is why those headers are part of `mbed-headers-<library>` and not
`mbed-stubs-<library>`. Before this refactoring, `mbed-headers-base`
was the first in unit tests' include paths.

Unit tests: Fix style in hal gpio_object.h stub

Unit tests: Move hal target_h stubs ...

Stubs previously in UNITTESTS/target_h/ have the same names as
regular Mbed OS headers, intending to override the latter directly.
We move hal target_h stubs into hal/tests/UNITTESTS/doubles/.

Note: In Mbed OS, the standard include format requires each header to
be prefixed with its module name, for example "hal/gpio_api.h". This
requires headers to be organized in a module directory. But unit tests
stubs for hal correspond to what a real Mbed target would have
implemented (in a non-test scenario), and targets do not currently put
headers in hal/, so we similary put stub headers directly in
hal/tests/UNITTESTS/doubles/ instead of add a hal/ subdirectory there.

pinvalidate.py script: add deprecated ARDUINO test

pinvalidate.py script: add SPI and I2C alias check ...

Goal is to follow
hal/include/hal/PinNameAliases.h

pinvalidate.py script: remove spaces

pin_names-generic test update before skipping it

CMake: Remove --coverage link option from mbed-stubs-hal ...

The --coverage flag globally set in UNITTESTS/CMakeLists.txt
and configuring the same option again in mbed-stubs-hal is
redundant so remove it

CMake: unit-tests: Make hal stubs only depend on headers it uses ...

Previously the hal stub library depended on `mbed-headers`, which
is a collection of all available headers in mbed-os. To make it easier
to separate the library, only depend on the headers we're using.

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.

Merge pull request #14718 from Meano/develop ...

Feature: Make changes for Cortex-A5 support

Merge pull request #14837 from LDong-Arm/K64F_pin_names ...

K64F: Fix pin names and migrate to Arduino Uno form factor

CMake: Require TEST_SOURCES in greentea CMake file ...

Assumption that greentea test file is always named main.cpp is
incorrect. Updated mbed_greentea_add_test() macro to make TEST_SOURCES
parameter compulsory, which is used to specify greentea test
file(s). This allows tests to use C, or have a different name.
Therefore also updated all pre-existing greentea test CMake files to
explicity add main.cpp to TEST_SOURCES.

CMake: Remove unnecessary CMakeLists.txt ...

CMakeLists.txt file in /hal/tests/TESTS/mbed_hal_fpga_ci_test_shield
directory was non-functional as it used the greentea_add_test macro,
which expects a main.cpp in current directory, but no main.cpp exists
there. I checked with @rajkan01 who confirmed that this CMake file is
serving no purpose and is there erroneously. All tests in subdirectories
of this directory have their own CMakeLists.txt that successfully build
them.

CMake: fix incorrect relative path for MBED_PATH ...

MBED_PATH set to /platform directory incorrectly. Updated to set to
/mbed-os directory.

Add shebang to pinvalidate.py ...

In the Standard Pin Names porting guide, pinvalidate.py is run
without prefixing the "python" command. But to make it possible,
a shebang needs to exist.

Unify the __CORTEX_A macro in the files containing cmsis.h

Merge pull request #14704 from jeromecoutant/PR_TEST_PIN ...

Pin name tests update

Merge pull request #14617 from ARMmbed/gp-spi2c-alias ...

Add legacy I2C/SPI pin aliases

Pin_names generic test: Add BUTTON3 test case

Pin_names arduino_uno test: Add a check for UART instance

Add Arduino Uno pin guards

Guard I2C/SPI aliases

Merge pull request #14336 from AGlass0fMilk/polymorphic-can ...

Implement polymorphism for CAN driver