chore(ci): run additional tests in integration (#8140)

With git 2.30 instead of git >= 2.42

These will be run once a day, when the mirror from the development repository happens and copies the branches to the integration repository (see .forgejo/workflows/mirror.yml).

A failure will not be blocking and will go unoticed until Codeberg is upgraded to v12 which can send a mail a workflow fails.

Note: remove the "debug" commit before merging.

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8140
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>

.forgejo/workflows-composite/apt-install-from/action.yaml

@@ -18,7 +18,7 @@ runs:
     - name: install packages
       run: |
         apt-get update -qq
-        apt-get -q install -qq -y ${PACKAGES}
+        apt-get -q install --allow-downgrades -qq -y ${PACKAGES}
       env:
         PACKAGES: ${{inputs.packages}}
     - name: remove temporary package list to prevent using it in other steps