Move OPA Gatekeeper exceptions out of package and into Big Bang

Except for the kube-system exclusion, move all opa gatekeeper exceptions into Big Bang's default settings for OPA Gatekeeper.

added Big Bang Security gatekeeper kindfeature statusdoing labels

assigned to @michaelmcleroy

added to epic &79 (closed)

changed milestone to %1.16.0

changed iteration to Big Bang Iterations Aug 24, 2021 - Sep 6, 2021

mentioned in merge request !768 (merged)

added statusreview label and removed statusdoing label

changed milestone to %1.15.0

changed iteration to Big Bang Iterations Aug 10, 2021 - Aug 23, 2021

mentioned in merge request !779 (merged)

mentioned in merge request !784 (closed)

closed with merge request !779 (merged)

mentioned in commit 85162caa

removed statusreview label