Dedupe vulnerabilities in bandit and semgrep

What does this MR do?

In this MR, we are trying to add a bandit identifier to semgrep vulnerability. This will help us dedupe vulnerability_findings on the rails side.

Examples of ruleID taken as input:

• rules.bandit.B502.B503
• rules.bandit.B502
• rules.bandit.B502-2

What are the relevant issue numbers?

Issue: gitlab-org/gitlab#321293 (closed)

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