Image digest policy off by default

Summary

This MR turns off the imageDigest gatekeeper policy by default because at this point in time the Iron Bank images are rebuilt each 12 hours. Pulling via digest is not feasible at this time.

Closes #780 (closed)

added gatekeeper teamXForce labels

added statusdoing label

changed the description

added statusreview label and removed statusdoing label

changed milestone to %1.19.0

approved this merge request

merged

mentioned in commit e334b8c9

mentioned in issue #636 (closed)