Split out optional testLatestDeps job

.github/workflows/pr-test-latest-deps.yml

@@ -0,0 +1,35 @@
+name: PR test latest deps
+
+on:
+  pull_request:
+    types:
+      - labeled
+
+concurrency:
+  group: pr-test-latest-deps-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  testLatestDeps:
+    runs-on: ubuntu-latest
+    # testLatestDeps is not included in the PR workflow by default
+    # because any time a new library version is released to maven central
+    # it can fail due to test code incompatibility with the new library version,
+    # or due to slight changes in emitted telemetry, which can be confusing for contributors
+    # (muzzle can also fail when a new library version is released to maven central
+    # but that happens much less often)
+    if: ${{ contains(github.event.pull_request.labels.*.name, 'test latest deps') }}
+    steps:
+      - uses: actions/checkout@v2.3.4
+
+      - name: Set up JDK 11 for running Gradle
+        uses: actions/setup-java@v2
+        with:
+          distribution: adopt
+          java-version: 11
+
+      - name: Test
+        uses: gradle/gradle-build-action@v2
+        with:
+          arguments: test -PtestLatestDeps=true
+          cache-read-only: true

.github/workflows/pr.yml

@@ -3,7 +3,7 @@ name: PR build
 on: pull_request
 
 concurrency:
-  group: ci-${{ github.event.pull_request.number }}
+  group: pr-${{ github.event.pull_request.number }}
   cancel-in-progress: true
 
 jobs:
@@ -115,30 +115,6 @@ jobs:
           path: "**/javacore.*.txt"
           if-no-files-found: ignore
 
-  testLatestDeps:
-    runs-on: ubuntu-latest
-    # testLatestDeps is not included in the PR workflow by default
-    # because any time a new library version is released to maven central
-    # it can fail due to test code incompatibility with the new library version,
-    # or due to slight changes in emitted telemetry, which can be confusing for contributors
-    # (muzzle can also fail when a new library version is released to maven central
-    # but that happens much less often)
-    if: ${{ contains(github.event.pull_request.labels.*.name, 'test latest deps') }}
-    steps:
-      - uses: actions/checkout@v2.3.4
-
-      - name: Set up JDK 11 for running Gradle
-        uses: actions/setup-java@v2
-        with:
-          distribution: adopt
-          java-version: 11
-
-      - name: Test
-        uses: gradle/gradle-build-action@v2
-        with:
-          arguments: test -PtestLatestDeps=true
-          cache-read-only: true
-
   smoke-test:
     runs-on: ${{ matrix.os }}
     strategy: