[v11.1.x] CI: Sync branch and tag after release (#90206)

CI: Sync branch and tag after release (#89967)

* Added `workflow_call` event to allow other workflows to invoke the "Create or update GitHub release"
* Added `dry_run` to `github-release.yml`
* Added `latest` to `release-pr.yml` which will cause the release PR to add a `release/latest` label.
* Removed unnecessary github app creation from github-release workflow and just used permissions.

(cherry picked from commit 63e715f6a9)

Co-authored-by: Kevin Minehart <5140827+kminehart@users.noreply.github.com>

.github/workflows/github-release.yml

@@ -1,27 +1,48 @@
 name: Create or update GitHub release
 on:
+  workflow_call:
+    inputs:
+      version:
+        required: true
+        description: Needs to match, exactly, the name of a milestone (NO v prefix)
+        type: string
+      latest:
+        required: false
+        default: false
+        description: Mark this release as latest (`1`) or not (`0`, default)
+        type: string
+      dry_run:
+        required: false
+        default: false
+        type: boolean
   workflow_dispatch:
     inputs:
       version:
         required: true
         description: Needs to match, exactly, the name of a milestone (NO v prefix)
+        type: string
       latest:
         required: false
         description: Mark this release as latest (`1`) or not (`0`, default)
+        type: string
+      dry_run:
+        required: false
+        default: false
+        type: boolean
+
+permissions:
+  # contents: write allows the action(s) to create github releases
+  contents: write
+
 jobs:
   main:
     runs-on: ubuntu-latest
     steps:
-      - name: "Generate token"
-        id: generate_token
-        uses: tibdex/github-app-token@b62528385c34dbc9f38e5f4225ac829252d1ea92
-        with:
-          app_id: ${{ secrets.GRAFANA_DELIVERY_BOT_APP_ID }}
-          private_key: ${{ secrets.GRAFANA_DELIVERY_BOT_APP_PEM }}
       - name: Create GitHub release (manually invoked)
         uses: grafana/grafana-github-actions-go/github-release@main
         with:
-          token: ${{ steps.generate_token.outputs.token }}
+          token: ${{ secrets.GITHUB_TOKEN }}
           version: ${{ inputs.version }}
           metrics_api_key: ${{ secrets.GRAFANA_MISC_STATS_API_KEY }}
           latest: ${{ inputs.latest }}
+          dry_run: ${{ inputs.dry_run }}