Adding workflow to delete untagged images in MAPDL package (#2524)

.github/workflows/docker_clean_untagged.yml

@@ -0,0 +1,29 @@
+name: Docker images - Cleanup
+on:
+  workflow_dispatch:
+  schedule: # UTC at 0200
+    - cron: "0 2 * * *"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
+  packages: write
+
+jobs:
+  cleanup:
+    name: Cleaning unnecessary packages
+    runs-on: ubuntu-latest
+    env:
+      PACKAGE_DELETION_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+    steps:
+
+    - name: "Perform versions cleanup - except certain tags"
+      uses: ansys/actions/hk-package-clean-untagged@v4
+      with:
+        package-name: 'mapdl'
+        token: ${{ secrets.GITHUB_TOKEN }}
+        allow-last-days: 5