Clean up group/module definitions in doxygen (#97) ...

* Clean up group definitions in doxygen

* remove THIRD_PARTY_DOCS

* some stragglers

* fix astyle formatting

Convert the rest of the hal tests, convert mbedtls to an OBJECT library

fix(docs): corrects various typos in project documentation

Make CryptoCell 310 part of mbed-mbedtls on supported targets ...

The CMake target mbed-mbedtls-cryptocell310 was not linked by
default, resulting in a compilation error on targets that use
Mbed TLS:

    fatal error: mbedtls_device.h: No such file or directory

Other Mbed TLS drivers simply add themselve to mbed-mbedtls, so this
commits does the alignment to fix the build error.

Note: the driver and the core Mbed TLS have mutual dependency, so
they need to be one CMake target.

CMake: remove IAR references as they are not supported

Fix CI issue: ...

- Added absolute path as cmake failed to find linker file from relative path
- Added the missing MBED_CONF_CRYPTOCELL310_PRESENT
- Added the dependency library to BLE Cordio stack

CMake: Simplify inclusion of cryptocell310 library files

CMake: Use relative paths to list source files and directories ...

The absolute path is still required for listing linker
files as they are referenced from a function in the top
level CMake input source file.

CMake: Rename CMake targets ...

* mbed-os renamed mbed-core
* mbed-os-<COMPONENT> renamed mbed-<COMPONENT>

CMake: Componentize Mbed OS into multiple CMake targets (#13732) ...

Aside from the core mbed-os CMake target, a number of targets have been created so they can optionally be included by application executables that require them using `target_link_libraries()`.

Co-authored-by: Martin Kojtal <martin.kojtal@arm.com>
Co-authored-by: Rajkumar Kanagaraj <rajkumar.kanagaraj@arm.com>

CMake: Fix NRF52840_DK build failure ...

* Remove duplicated ARM toolchain directory
* Link with archived cryptocell 310 libraries instead
  of adding them as source files
* Provide default MBED_BOOT_STACK_SIZE definition
  in scatter file as is done for GCC_ARM linker file

CMake: Fix include path for Cryptocell

CMake: Fix build failure due to lora, cryptocell, and nfc dirs move

Move cryptocell ...

mbed-os/features/cryptocell/FEATURE_CRYPTOCELL310 directory moved
to mbed-os/connectivity/drivers/cryptocell/FEATURE_CRYPTOCELL310
and restructured according to the internal proposal.