trivy-operator integration with kube-enforcer

[KiranBodipi]

With this change, we are replacing starboard operator with trivy operator

1. We have updated kube_enforcer,kube_enforcer_advanced manifest files with Trivy Operator Resources

2. Moved starboard manifest files to kube_enforcer_starbaord and kube_enforcer_advanced_starboard

3. Updated relevant gen_ke_certs.sh and readme files Reference PR: https://github.com/aquasecurity/deployments/pull/566

4. Upgraded trivy-operator version to latest (0.20.1)as the existing version has critical vulnerabilities

5. Upgraded kube-bench version with latest (v0.7.3) Reference PR: https://github.com/aquasecurity/deployments/pull/567

6. Added keys for Admission Control when the GW is disconnected, Enable workload discovery, Register discovered pod images, and Add discovered registries.

7. Removed the AQUA_WATCH_CONFIG_AUDIT_REPORT key as it is no longer supported. Reference PR: https://github.com/aquasecurity/deployments/pull/565