Set version to 20.0.0

Use RESOURCE_LOCAL transactions for JPA map storage

Closes keycloak#15248

Set version to 19.0.3

Set version to 19.0.2

Set version to 19.0.1

Set version to 19.0.0

Set version to 18.0.2

Fix Operator compilation errors (keycloak#485)

Add GPG signing to boms

Add javadoc artefacts to spring bundles (keycloak#10261)

Closes keycloak#10260