Ability to set prefix for release version branches

In SNAP there is a conflicting namespaces for version tags and version
branches

Author: Peter-Sh

.github/actions/ensure-release-branch/action.yml

@@ -5,6 +5,9 @@ inputs:
   release_branch:
     description: 'Existing release branch'
     required: false
+  release_version_branch_prefix:
+    description: 'Prefix for release version branch (e.g., "release/")'
+    required: false
   allow_modify:
     description: 'Allow modifying the repository'
     default: false
@@ -28,5 +31,9 @@ runs:
       env:
         GITHUB_TOKEN: ${{ inputs.gh_token }}
       shell: bash
-      run: |
-        ${{ github.action_path }}/ensure-release-branch.sh ${{ inputs.allow_modify == 'true' && '--allow-modify' || '' }} ${{ inputs.release_branch != '' && format('--release-branch {0}', inputs.release_branch) || '' }} ${{ inputs.release_tag }}
+      run: >-
+        ${{ github.action_path }}/ensure-release-branch.sh
+        ${{ inputs.allow_modify == 'true' && '--allow-modify' || '' }}
+        ${{ inputs.release_branch != '' && format('--release-branch {0}', inputs.release_branch) || '' }}
+        ${{ inputs.release_version_branch_prefix != '' && format('--release-version-branch-prefix {0}', inputs.release_version_branch_prefix) || '' }}
+        ${{ inputs.release_tag }}

.github/actions/ensure-release-branch/ensure-release-branch.sh

@@ -23,6 +23,7 @@ SCRIPT_DIR="$(dirname -- "$( readlink -f -- "$0"; )")"
 ALLOW_MODIFY=""
 TAG=""
 RELEASE_BRANCH=""
+RELEASE_VERSION_BRANCH_PREFIX=""
 
 while [[ $# -gt 0 ]]; do
     case $1 in
@@ -35,6 +36,11 @@ while [[ $# -gt 0 ]]; do
             shift
             shift
             ;;
+        --release-version-branch-prefix)
+            RELEASE_VERSION_BRANCH_PREFIX="$2"
+            shift
+            shift
+            ;;
         -*)
             echo "Error: Unknown option $1"
             exit 1
@@ -58,7 +64,7 @@ if [ -z "$TAG" ]; then
 fi
 
 # Define RELEASE_VERSION_BRANCH which is the same as TAG
-RELEASE_VERSION_BRANCH="$TAG"
+RELEASE_VERSION_BRANCH="$RELEASE_VERSION_BRANCH_PREFIX$TAG"
 
 echo "release_version_branch=$RELEASE_VERSION_BRANCH" >> "$GITHUB_OUTPUT"