tests: cmsis_dsp: rf16 and cf16 tests are not executed on Native POSIX

[gopiotr]

Describe the bug
Following test scenarios:

• libraries.cmsis_dsp.transform.cf16
• libraries.cmsis_dsp.transform.cf16.fpu
• libraries.cmsis_dsp.transform.rf16
• libraries.cmsis_dsp.transform.rf16.fpu

From this directory:
tests/lib/cmsis_dsp/transform/
are not executed - only PROJECT EXECUTION SUCCESSFUL is printed.
Problem concerns only native_posix platform.
On mps2_an521 and mps2_an521_remote platforms everything works properly.

To Reproduce
Steps to reproduce the behavior:

1. Run Twister by this command:
   ./scripts/twister -p native_posix -T tests/lib/cmsis_dsp/transform/
2. Analyze twister.log file - especially execution of rf16 and cf16 tests.

Expected behavior
Tests should be executed - not only printing of PROJECT EXECUTION SUCCESSFUL information.

Impact
At this moment those tests are marked as PASS what is misleading information, because they aren't even executed.

Logs and console output

2022-03-15 17:14:39,977 - twister - DEBUG - Spawning BinaryHandler Thread for native_posix/tests/lib/cmsis_dsp/transform/libraries.cmsis_dsp.transform.cf16.fpu
2022-03-15 17:14:39,978 - twister - DEBUG - OUTPUT: *** Booting Zephyr OS build zephyr-v3.0.0-884-gadc901aa6a39  ***
2022-03-15 17:14:39,978 - twister - DEBUG - OUTPUT: ===================================================================
2022-03-15 17:14:39,979 - twister - DEBUG - OUTPUT: PROJECT EXECUTION SUCCESSFUL
2022-03-15 17:14:39,979 - twister - DEBUG - OUTPUT: 

Environment (please complete the following information):

• OS: Linux
• Toolchain: Zephyr SDK
• Commit SHA: adc901a

Additional context
Similar problem occurred here:
#42396
But I verified, that those tests do not work since the beginning - since they was added in those commits:
600ca01
6547025
So, the source of problem is probably not connected with changes introduced in ZTest API in October last year.

This problem was discovered during review of this PR:
#42482
Enhancement proposed in this PR could help to avoid this situation, due to the additional verification of printed test suite name.

If everything works properly on QEMU platforms, then perhaps it should be considered to remove support for Native POSIX platform for those tests?

[stephanosio]

NOTE: similar situation with the matrix tests.