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.

- 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

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

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>

* 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

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