Add a workflow for sigtest CI testing.

Signed-off-by: James R. Perkins <jperkins@redhat.com>

.github/workflows/sigtest-ci.yml

@@ -0,0 +1,52 @@
+# This workflow will build a Java project with Maven
+# For more information see: https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
+
+name: Build and Test TCK sigtest Tooling
+
+on:
+  pull_request:
+    branches:
+      - '**'
+    paths:
+      - '.github/workflows/sigtest-ci.yml'
+      - 'tools/sigtest/**'
+  push:
+    branches:
+      - '**'
+    paths:
+      - '.github/workflows/sigtest-ci.yml'
+      - 'tools/sigtest/**'
+
+# Only run the latest job
+concurrency:
+  group: '${{ github.workflow }} @ ${{ github.event.pull_request.head.label || github.head_ref || github.ref }}'
+  cancel-in-progress: true
+
+jobs:
+  build-sigtest-tools:
+
+    runs-on: ubuntu-latest
+    timeout-minutes: 120
+    strategy:
+      fail-fast: false
+      matrix:
+        java: ['17', '21', '23']
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up JDK ${{ matrix.java }}
+        uses: actions/setup-java@v4
+        with:
+          java-version: ${{ matrix.java }}
+          distribution: 'temurin'
+          cache: 'maven'
+
+      - name: sigtest-jdk-${{ matrix.java }}
+        run:  |
+          cd tools/sigtest
+          mvn clean install -U -B -fae
+      - uses: actions/upload-artifact@v4
+        if: failure()
+        with:
+          name: surefire-reports-jdk-${{ matrix.java }}
+          path: '**/surefire-reports/'