refactor(structure): remove leading gitea directory (#958)

The following pull request removes the `gitea` directory. With regard to maintaining act_runners in a separate git repository or helm chart, this additional directory becomes redundant.

Reviewed-on: https://gitea.com/gitea/helm-gitea/pulls/958
Reviewed-by: DaanSelen <daanselen@noreply.gitea.com>
Co-authored-by: Markus Pesch <markus.pesch@cryptic.systems>
Co-committed-by: Markus Pesch <markus.pesch@cryptic.systems>

unittests/helm/init/init_directory_structure.sh-rootless.yaml

@@ -3,7 +3,7 @@ release:
   name: gitea-unittests
   namespace: testing
 templates:
-  - templates/gitea/init.yaml
+  - templates/init.yaml
 tests:
   - it: runs gpg in batch mode
     set:
@@ -63,7 +63,7 @@ tests:
               chown -v 1000:1000 "${GNUPGHOME}"
             fi
   - it: it does not chown /data even when image.fullOverride is set
-    template: templates/gitea/init.yaml
+    template: templates/init.yaml
     set:
       image.fullOverride: docker.gitea.com/gitea:1.20.5
     asserts: