fix: actions: refactor force-rebuild tests to use a remote action (#991)

The local actions are always rebuilt with a random tag and cannot be used to verify the force_rebuild setting is working.

Reviewed-on: https://code.forgejo.org/forgejo/end-to-end/pulls/991
Reviewed-by: Michael Kriese <michael.kriese@gmx.de>
Co-authored-by: Earl Warren <contact@earl-warren.org>
Co-committed-by: Earl Warren <contact@earl-warren.org>

actions/example-force-rebuild/.forgejo/workflows/test.yml

@@ -1,10 +1,11 @@
----
-on:
-  push:
+on: [push]
+
 jobs:
-  test:
+  ls:
     runs-on: docker
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - uses: ./.forgejo/local-docker-action
+      - uses: https://code.forgejo.org/forgejo/test-setup-forgejo-docker@main
+        with:
+          args: ${{ forge.workspace }}/SOMEFILE
+      - run: |
+          test -f ${{ forge.workspace }}/SOMEFILE