[Task] - Review CMake target link with mbed-os almost everywhere

[ladislas]

Description

Because of the previous CMake implementation, all targets which needed to use mbed-os related code needed to link against mbed-os.

With the new mbed-ce CMake implementation, it should not be needed anymore.

Review the use of

target_link_libraries(TARGET_NAME
	mbed-os # <-- really needed?
	...
)

and remove/replace it where needed.