Resolve "Keycloak new release"

Summary

New release version for Keycloak

• default config refactoring
• new custom plugin/image update with UI fixes
• add custom volumes and volumemounts for bigbang integration

Package MRs

• https://repo1.dso.mil/platform-one/big-bang/apps/security-tools/keycloak/-/merge_requests/26
• https://repo1.dso.mil/platform-one/big-bang/apps/security-tools/keycloak/-/merge_requests/27
• https://repo1.dso.mil/platform-one/big-bang/apps/security-tools/keycloak/-/merge_requests/28

Closes #497 (closed)