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/deployment/storage-class-configuration.yaml

@@ -7,11 +7,11 @@ release:
   namespace: testing
 
 templates:
-  - templates/gitea/pvc.yaml
+  - templates/pvc.yaml
 
 tests:
   - it: should set storageClassName when persistence.storageClass is defined
-    template: templates/gitea/pvc.yaml
+    template: templates/pvc.yaml
     set:
       persistence.storageClass: "my-storage-class"
     asserts:
@@ -20,7 +20,7 @@ tests:
           value: "my-storage-class"
 
   - it: should set global.storageClass when persistence.storageClass is not defined
-    template: templates/gitea/pvc.yaml
+    template: templates/pvc.yaml
     set:
       global.storageClass: "default-storage-class"
     asserts:
@@ -29,7 +29,7 @@ tests:
           value: "default-storage-class"
 
   - it: should set storageClassName when persistence.storageClass is defined and global.storageClass is defined
-    template: templates/gitea/pvc.yaml
+    template: templates/pvc.yaml
     set:
       global.storageClass: "default-storage-class"
       persistence.storageClass: "my-storage-class"