ci: Do not cache locally published artifacts

These workflows publish artifacts to local maven repository, which are
then cached by GH Actions. Removing them at the end of the workflow
prevents them to pollute the cache.

.github/workflows/graalvm.yml

@@ -56,3 +56,8 @@ jobs:
       - name: Stop Gradle Daemon
         if: ${{ always() }}
         run: cd test/jte-runtime-cp-test-gradle-convention && ./gradlew --stop
+
+      # This prevents local published artifacts from be added to GH Actions cache
+      - name: Clean local artifacts
+        if: ${{ always() }}
+        run: rm -rvf ~/.m2/repository/gg/jte/

.github/workflows/maven.yml

@@ -63,6 +63,11 @@ jobs:
           name: failing-test-report
           path: test/gradle-test-wrapper/build/reports/tests/test/**/*
 
+      # This prevents local published artifacts from be added to GH Actions cache
+      - name: Clean local artifacts
+        if: ${{ always() }}
+        run: rm -rvf ~/.m2/repository/gg/jte/
+
 
   coverage:
     # Do not run coverage for forks since they cannot upload