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/act_runner/config-act-runner.yaml

@@ -0,0 +1,45 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/helm-unittest/helm-unittest/main/schema/helm-testsuite.json
+suite: actions template | config-act-runner
+release:
+  name: gitea-unittests
+  namespace: testing
+templates:
+  - templates/gitea/act_runner/config-act-runner.yaml
+tests:
+  - it: doesn't renders a ConfigMap by default
+    template: templates/gitea/act_runner/config-act-runner.yaml
+    asserts:
+      - hasDocuments:
+          count: 0
+  - it: renders a ConfigMap
+    template: templates/gitea/act_runner/config-act-runner.yaml
+    set:
+      actions:
+        enabled: true
+        statefulset:
+          actRunner:
+            config: |
+              log:
+                level: info
+              cache:
+                enabled: false
+              runner:
+                labels:
+                  - "ubuntu-latest"
+    asserts:
+      - hasDocuments:
+          count: 1
+      - containsDocument:
+          kind: ConfigMap
+          apiVersion: v1
+          name: gitea-unittests-act-runner-config
+      - equal:
+          path: data["config.yaml"]
+          value: |
+            log:
+              level: info
+            cache:
+              enabled: false
+            runner:
+              labels:
+                - "ubuntu-latest"