Move Helm unittests into subfolder (#750)

Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/750
Co-authored-by: justusbunsi <sk.bunsenbrenner@gmail.com>
Co-committed-by: justusbunsi <sk.bunsenbrenner@gmail.com>

unittests/helm/deployment/sidecar-container.yaml

@@ -0,0 +1,21 @@
+suite: sidecar container
+release:
+  name: gitea-unittests
+  namespace: testing
+templates:
+  - templates/gitea/deployment.yaml
+  - templates/gitea/config.yaml
+tests:
+  - it: supports adding a sidecar container
+    template: templates/gitea/deployment.yaml
+    set:
+      extraContainers:
+        - name: sidecar-bob
+          image: busybox
+    asserts:
+      - equal:
+          path: spec.template.spec.containers[1].name
+          value: "sidecar-bob"
+      - equal:
+          path: spec.template.spec.containers[1].image
+          value: "busybox"