Create a PR to update OSP nightly deployment

Currently this includes:
    1. Check for nightly build and update the CatalogSource
    2. Update the kustomization.yaml to add the CatalogSource
    3. Update the Subscription to use the new CatalogSource and channel

Once we start using the nightly builds, we only need to update the
CatalogSource to use the new index image.

.github/workflows/update-osp-nightly.yaml

@@ -0,0 +1,36 @@
+---
+name: update-osp-nightly
+run-name: Check for OSP nightly and create a PR
+on: workflow_dispatch
+permissions: {}  # drop all permissions; the default triggers codecov failure
+jobs:
+  update-osp-nightly:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+      - name: Update CatalogSource
+        run: |
+          tag="v4.14-candidate"
+          inspected=$(skopeo inspect docker://quay.io/openshift-pipeline/openshift-pipelines-pipelines-operator-bundle-container-index:$tag)
+          created=$(echo "$inspected" | jq -r '.Created')
+          echo "DEBUG: Found tag $tag created: $created"
+          digest=$(echo "$inspected" | jq -r '.Digest')
+          echo "DEBUG: Tag digest: $digest"
+          sed -i -E "s/sha256:[0-9a-f]{64}/${digest}/g" operator/gitops/argocd/pipeline-service/openshift-pipelines/osp-nightly-catalog-source.yaml
+      - name: Enable CatalogSource  # Could be removed once we switch to nightly builds
+        run: yq -i '.resources += "osp-nightly-catalog-source.yaml"' operator/gitops/argocd/pipeline-service/openshift-pipelines/kustomization.yaml
+      - name: Update Subscription  # Could be removed once we switch to nightly builds
+        run: yq -i '.spec.channel = "latest" | .spec.source = "custom-operators"' operator/gitops/argocd/pipeline-service/openshift-pipelines/openshift-operator.yaml
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v5
+        with:
+          commit-message: "[new-osp-nightly-build] automated change"
+          title: "[DO-NOT-MERGE] Automated change to update OSP nightly"
+          body: |
+            Automated change by [update-osp-nightly]
+
+            The change is only intended to test the nightly build in the CI.
+            Do not merge!