[Fix] Correct Immunity enum and apply it where it belongs

[Xaver-DaRed]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

• Correct immunity enum, that was using c++ style, as oposed to what was being used in scripts, which was what one would expect, when looking at any other enum.
• Apply enum to scripts which werent using them.
• Add Petrify immunity to Break and Breakga checks.

Steps to test these changes

No changes should be observed, other than break spells now failing on petrify-immune enemies.