Migrate RHDM templates to the RHPAM repository and map drools environment variable to RHPAM related one.

List of RHDM templates:

• rhdm713-authoring-ha.yaml
• rhdm713-authoring.yaml
• rhdm713-kieserver.yaml
• rhdm713-prod-immutable-kieserver-amq.yaml
• rhdm713-prod-immutable-kieserver.yaml
• rhdm713-trial-ephemeral.yaml

Tasks that needs to be done as part of this change:

• move RHDM application templates to RHPAM templates
  • update images references
  • update quickstarts location
  • update the application template checker to match the new labels. 
• move RHDM quickstarts to RHPAM
• Update RHPAM project's README.
• Update operator references from rhdm to rhpam
  • update base images
  • update quickstart location
• update the gen-template-adoc tool to reflect the changes
  • need to generate the the adoc files for all templates
  • need to update the docs/README.adoc with the rhdm templates
  • remove references to RHDM (clean up the script)?
• Update RHDM README file with more information about the product unification.
  • Remove content migrated content from RHDM repository?
    • no.