Running tests can try to run non-tests as tests

[alexet]

Describe the bug
When you have a folder that contains both multiple test packs and non-test packs, it will appear as runnable in the UI with the test packs a subpacks. When you run that folder it will also run the non-tests ibnside it as well.

Version
CodeQL extension version: 1.6.11
CodeQL CLI version: 2.10.3
Platform: linux x64

To reproduce
Open https://github.com/github/codeql-coding-standards/tree/next
Run the c folder in the testing pane. See codeql fail to find the extractor for a non-test folder.

Expected behavior

Only to try run the tests as tests.

Additional context

This can be seen by trying to run the c folder on https://github.com/github/codeql-coding-standards/tree/next

I think we either need to pass --strict-test-discovery when running or explicitly pass the set of tests rather than the folder.