chore: remove test workflow, clean up test tags

.gitea/workflows/test-tag.yaml

@@ -1,15 +0,0 @@
-name: Tag Trigger Test
-on:
-  push:
-    tags:
-      - "test-*"
-jobs:
-  test:
-    runs-on: shell
-    steps:
-      - name: Test
-        run: |
-          echo "Tag trigger works!"
-          echo "Ref: ${{ gitea.ref_name }}"
-          echo "Time: $(date)"
-          date | sudo tee -a /tmp/tag-test.log