* new-rule-gcp-firewall-rule-deleted
* Update rule maturity to production
* Add FP info to rule
* Update rule maturity to production
* Add ATT&CK metadata
* Lint rule
* Update name to align with other rules
Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>
Co-authored-by: Brent Murphy <56412096+bm11100@users.noreply.github.com>