PyPi packages and advisories are matched partially according to PEP503

What does this MR do?

• Extends pythonGlob so that package names will match better with GLAD advisory paths. We do that by applying PEP503 between the dependencies scanned and the advisory paths. According to PEP503 _-. should be interpreted as - and all letters should be lower case. We make sure that we add . in the list of special characters.

• Adds Unit test case for this specific case.

What are the relevant issue numbers?

gitlab-org/gitlab#440392 (comment 1829828183)

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated for GitLab EE, if necessary
• Documentation created/updated for this project, if necessary
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Job definition updated, if necessary
  • Auto-DevOps template
  • Job definition example
  • CI Templates
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer