Fix regexes for invalid SSNs

What does this MR do?

Fix the regexes for Social Security Number by adding missing patterns of non-assigned SSN according to Social Security dept.

References:

• https://secure.ssa.gov/poms.nsf/lnx/0110201035
• https://rion.io/2013/09/10/validating-social-security-numbers-through-regular-expressions-2/

What are the relevant issue numbers?

None

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