Chore: Migrate `pr-lint-backend` from Drone to GHAs (#101482)

* baldm0mma/ create backend-code-checks workflow

* baldm0mma/ update to validate backend configs

* baldm0mma/ rem unused dir

* baldm0mma/ update codeowners

* baldm0mma/ update naming

* baldm0mma/ update case

* baldm0mma/ update workflow name

* baldm0mma/ rem action and run the commands directly

* baldm0mma/ update codeownders

* baldm0mma/ update codeowners for workflow

* baldm0mma/ update workflow name in codeowners

.github/CODEOWNERS

@@ -783,6 +783,7 @@ embed.go @grafana/grafana-as-code
 /.github/workflows/issue-opened.yml @grafana/grafana-community-support
 /.github/workflows/metrics-collector.yml @torkelo
 /.github/workflows/milestone.yml @tolzhabayev
+/.github/workflows/pr-backend-code-checks.yml @grafana/grafana-backend-group
 /.github/workflows/pr-checks.yml @tolzhabayev
 /.github/workflows/pr-codeql-analysis-go.yml @DanCech
 /.github/workflows/pr-codeql-analysis-javascript.yml @DanCech

.github/workflows/pr-backend-code-checks.yml

@@ -0,0 +1,32 @@
+name: Backend Code Checks
+description: Validate go.mod and OpenAPI specifications
+
+on:
+  pull_request:
+    paths-ignore:
+      - '*.md'
+      - 'docs/**'
+      - 'latest.json'
+
+permissions:
+  contents: read
+
+jobs:
+  validate-configs:
+    name: Validate Backend Configs
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.23.5'
+          cache: true
+      
+      - name: Validate go.mod
+        run: go run scripts/modowners/modowners.go check go.mod
+
+      - name: Generate and Validate OpenAPI Specs
+        run: |
+          make swagger-gen