fixing the global flags issue in joomla_template_scan and drupal_theme_scan

[pUrGe12]

Proposed change

Python doesn't support inline regex flags like (?i) to be anywhere but the start of the regex. This PR is to fix that.

Additionally, this adds a test file to scans all regexes of yaml files inside scan and vuln based on what their library is (this condition was just to separate out port.yaml which has a slightly different yaml structure and goes inside socket.py)

Type of change

• New core framework functionality
• Bugfix (non-breaking change which fixes an issue)
• Code refactoring without any functionality changes
• New or existing module/payload change
• Documentation/localization improvement
• Test coverage improvement
• Dependency upgrade
• Other improvement (best practice, cleanup, optimization, etc)

Checklist

• I've followed the contributing guidelines
• I've run make pre-commit, it didn't generate any changes
• I've run make test, all tests passed locally