[v10.0.x] Added security patch delivery workflows (#71139)

Added security patch delivery workflows (#71101)

* adding security patch workflows

* adding grafana-delivery as codeowners for new pr-security-check workflows

* adding release branch triggers to PR security patch github action

* joined security patching mirror and apply jobs

* remove temp files

(cherry picked from commit d88046d3d4)

Co-authored-by: Ricky Whitaker <ricky.whitaker@grafana.com>

.github/workflows/pr-security-patch-check.yml

@@ -0,0 +1,24 @@
+# Owned by grafana-delivery-squad
+# Intended to be dropped into the base repo Ex: grafana/grafana 
+name: Check for security patch conflicts
+run-name: check-security-patch-conflicts-${{ github.base_ref }}-${{ github.head_ref }}
+on:
+  pull_request_target:
+    types:
+      - opened
+    branches:
+      - "main"
+      - "v*.*.*"
+      - "release-*"
+
+# Since this is run on a pull request, we want to apply the patches intended for the
+# target branch onto the source branch, to verify compatibility before merging.
+jobs:
+  trigger_downstream_patch_check:
+    uses: grafana/security-patch-actions/.github/workflows/test-patches.yml@main
+    with:
+      src_repo: "${{ github.repository }}"
+      src_ref: "${{ github.head_ref }}" # this is the source branch name, Ex: "feature/newthing"
+      patch_repo: "${{ github.repository }}-security-patches"
+      patch_ref: "${{ github.base_ref }}" # this is the target branch name, Ex: "main"
+    secrets: inherit