fix: regex issue on the skip path

[quixoticmonk]

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Description

This PR fixes a regex compilation error in the Terraform module finder when using character classes in --skip-path patterns. The issue occurred when users provided regex patterns with character classes (like [a-z0-9-]+) in the excluded_paths parameter, causing the module finder to crash with a regex compilation error.

The fix changes the regex handling approach from compiling all patterns into a single regex to compiling each pattern individually and handling invalid regex patterns by skipping them.

Fixes #7290

Should the test structure be changed to use a terraform configuration from a directory than inline?

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my feature, policy, or fix is effective and works
• New and existing tests pass locally with my changes

[bo156]

Thanks for the contribution @quixoticmonk!
Could you rebase your branch so the tests will run? I could do it for you just didn't want to cause conflicts in your side :)

[bo156]

@quixoticmonk I see that the unit tests failed here, could you push a fix? 🧪