Amend Check Rules Script for Future Fetch Tests #19714

Items that need attention for test/rules/src/https_everywhere_checker/check_rules.py script in result from postmortem review on last Fetch Test

• Skip Onion Rulesets, Edit: Allowlist should list all Onions properly. Make sure to add to fetch test rubric
• Check for recently expired certs (60 Days Grace Period)
• Review Travis fetch test should not pass for revoked certificates #19330