Go: add RTJO language tests CI job

Triggered by adding label "Run: RTJO Language Tests"

.github/workflows/go-tests-rtjo.yml

@@ -0,0 +1,22 @@
+name: "Go: Run RTJO Tests"
+on:
+  pull_request:
+    types:
+      - labeled
+
+permissions:
+  contents: read
+
+jobs:
+  test-linux:
+    if: "github.repository_owner == 'github' && github.event.label.name == 'Run: RTJO Language Tests'"
+    name: RTJO Test Linux (Ubuntu)
+    runs-on: ubuntu-latest-xl
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+      - name: Run tests
+        uses: ./go/actions/test
+        with:
+          run-code-checks: true
+          dynamic-join-order-mode: all