Enable support for Red Hat Build of Keycloak (RHBK) via Keycloak provisioning tooling, and deprecate support for RHSSO 7.6 provisioning

[fabiobrz]

Is your feature request related to a problem? Please describe.
Intersmash must support Red Hat Build of Keycloak (RHBK) via Keycloak provisioning tooling, and deprecate support for RHSSO 7.6 provisioning.

Describe the solution you'd like

• Check that the keycloak provisioning tooling works with RHBK OpenShift deliverables, and fix anything if needed
• Deprecate RHSSO 7.6 provisioning tooling and evaluate impact on internal tests that will have to be modified in order to use the new provisioning tooling
• Update documentation, specifically mentioning the fact that identifiers (e.g.: class names) are named after their community service (e.g.: KeycloakOperatorProvisioner) and should support the latest product counterpart (e.g.: RHBK) by default.

Describe alternatives you've considered
None, Intersmash must support testing with the latest Keycloak product counterpart.

Additional context
The deprecation must leave time for internal tests to be modified in order to use the new provisioning tooling