Introduce build-artifacts.

Author: dkostyrev

.github/workflows/build-artifacts.yml

@@ -0,0 +1,35 @@
+name: Build Artifacts (Java 8)
+
+env:
+  MAVEN_ARGS: -B -C -V -ntp -Dhttp.keepAlive=false -e -Prelease -DstagingProgressTimeoutMinutes=20
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build-artifacts:
+    name: Build JARs Java 8
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup Java 8
+        uses: actions/setup-java@v4
+        with:
+          java-version: 8
+          distribution: 'temurin'
+      - name: Build Project (skip tests)
+        run: ./mvnw ${MAVEN_ARGS} clean package -DskipTests
+      - name: Collect JARs
+        run: |
+          mkdir -p artifacts
+          find . -path ./artifacts -prune -o -name '*.jar' -not -name '*-sources.jar' -not -name '*-javadoc.jar' -print | xargs -I{} cp {} artifacts/
+      - name: Upload JARs as artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: kubernetes-client-jars-java8
+          path: artifacts/*.jar
+          if-no-files-found: error