ci: Add test-rtl task to CI workflow

Author: rascmatt

.github/workflows/openvadl-ci.yml

@@ -41,7 +41,7 @@ jobs:
     uses: ./.github/workflows/reusable-test.yml
     strategy:
       matrix:
-        task: [ test-lcb, test-common, test-iss ]
+        task: [ test-lcb, test-common, test-iss, test-rtl ]
         include:
           - runner: self-hosted
     with:
@@ -60,4 +60,4 @@ jobs:
         run: exit 0
       - name: Failing CI
         if: ${{ contains(needs.*.result, 'failure') }}
-        run: exit 1
+        run: exit 1