tests: posix: common: split semaphore tests into a standalone test #80964
Description
Is your enhancement proposal related to a problem? Please describe.
Make the semaphore-related tests in tests/posix/common into a standalone test.
Describe the solution you'd like
The obvious way to group semaphore-related testsuites is by POSIX_SEMAPHORES Option Group.
Describe alternatives you've considered
The way the testsuite has been designed historically.
Additional context
See #79454 for more info