Only support GCC ARM compiler, but reap the benefits of static libraries instead of objects

- Split mbed-core and mbed-rtos into -sources and -flags targets ...

- Fix some logic errors in top level cmakelists related to building greentea tests
- Fix mbed_create_distro() for OBJECT libraries

greentea: Add missing license header ...

Add missing license header to greentea_metrics.h

Deprecate the Greentea metrics API ...

Add the deprecated macro to where the Greentea metrics API is declared.

Fixes #14790

CMake: greentea: Fix io issue with greentea-client ...

The stdio implementation of the standalone greentea-client wasn't
streaming "KiVi protocol" messages through the serial IO. Separate out
the existing implementation for greentea-client that uses
mbed_retarget.h's `read` and `write` functions so greentea tests
continue to work with the standalone client.

The IO fixture is shared between the "legacy" embedded greentea-client
and the newer standalone client.

Use standalone greentea-client ...

For CMake or Mbed CLI 2, use the standalone greentea-client.

Replace USBTX/RX

CMake: Create mbed-greentea library

GreenTea: Fix inconsistenet Greentea KV message

Revert "Fix kv parsing bug in greentea client." ...

This reverts commit c70baa9.

Reason for revert: needs to be reviewed again, will be sent via new PR

Fix kv parsing bug in greentea client. ...

Mbed greentea sends all KV pairs in the following format:
"{{key,value}}\n"
Previously the greentea client code was not reading the final '\n' from
the UART as part of the HandleKV() call. This did not cause an
error when multiple KV pairs were being parsed because any whitespace
proceeding a message was ignored. Once the final KV pair was sent,
however, HandleKV() would only read up to the "}}" leaving the final
'\n' in the UART buffer.

MBED_STACK_STATS_ENABLED : Add stack_name information in greentea metrics

Replace RawSerial instances as it has been deprecated

Fixed the greentea test dependency and incorporated the review comments ...

-Added the mbedtls,crypto,psa,filesystem,fat,littlefs in baremetal.json to resolve compiler issue
 -Disable metrics that are not available for bare metal
 -Moved the baremetal.json inside TESTS/configs directory

Bare metal greentea support ...

-Added the baremetal.json on Tests directory to enable bare-metal
 -Conditional enable of greentea metrics

Note:
Run green tea with bare metal
mbed test  -m target -t GCC_ARM -n tests-mbed_platform-transaction  --app-config TESTS/baremetal.json

GREENTEA: init trace if trace is enabled in json

Can compile without serial

Update features/frameworks/greentea-client/source/greentea_test_env.cpp ...

Co-Authored-By: orenc17 <oren.cohen@arm.com>

Add define to skip greentea sync

Merge pull request #9561 from theotherjimmy/test-resources ...

Tools changes for bare metal

Correct example given in greentea-client readme

Remove reference to yotta and mbed-drivers in greentea-client

Remove outdated content from README.md ...

Remove requested outdated content, and update TOC to reflect changes.

Remove .json blob from README.md ...

Make change suggested in comments.

Update features/frameworks/greentea-client/README.md ...

Co-Authored-By: AnotherButler <Amanda.Butler@arm.com>

Remove yotta from README.md ...

Remove all references to yotta.md

Add placeholder libraries for things we probably refer to as libraries

Resolve build issues in test ...

mbed.h was added in test, via greentea and utest header files. 'mbed.h' is removed
from header files and required header file and namespace is added to CPP/C files

Greentea: Add required header file and namespace element instead add all ...

1. RTOS is needed only for Stack stats

Move+Add all required header files for RTOS into MBED_STACK_STATS_ENABLED
define. Also added 'using namespace'

2.  Add heap stats only when MBED_HEAP_STATS_ENABLED

Framework: Add required header file and namespace element instead add all