Mbed OS PSA tests not run in CI

[LDong-Arm]

Description of defect

In order for Mbed OS PSA tests to be picked up, the following command line is needed:

mbed test -t <TOOLCHAIN> -m <TARGET> --app-config TESTS/configs/experimental.json

where <TARGET> needs to have PSA enabled (e.g. K64F or K66F). It's because the tests are inside FEATURE_EXPERIMENTAL_API and not visible unless EXPERIMENTAL_API is added to the list of features using experimental.json.

Since non-experimental tests are already covered by regular Greentea testing, we may use a filter -n platform-feature_experimental_api-* to limit the scope.

Target(s) affected by this defect ?

K64F/K66F (one target is probably sufficient)

Toolchain(s) (name and version) displaying this defect ?

GCC_ARM and ARM (use the versions available in CI)

What version of Mbed-os are you using (tag or sha) ?

mbed-os-6.10.0

What version(s) of tools are you using. List all that apply (E.g. mbed-cli)

mbed-cli 1.10.5

How is this defect reproduced ?

There's currently no CI coverage of mbed test with --app-config TESTS/configs/experimental.json.

[ciarmcom]

Thank you for raising this detailed GitHub issue. I am now notifying our internal issue triagers.
Internal Jira reference: https://jira.arm.com/browse/IOTOSM-3980