chore(branch): create release-1.3 branch from 1.3.x; refactor actions (RHIDP-4031) (#506)

Author: nickboldt

.github/workflows/build-asciidoc.yml

@@ -21,6 +21,7 @@ on:
     - main
     - rhdh-1.**
     - 1.**.x
+    - release-1.[0-9]+
 
 jobs:
   adoc_build:

.github/workflows/pr.yml

@@ -27,6 +27,7 @@ on:
     - main
     - rhdh-1.**
     - 1.**.x
+    - release-1.[0-9]+
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.number || github.event.pull_request.head.ref }}