Add Gitea Actions act runner (#666)

Co-authored-by: dementhorr <dementhorr@proton.me>
Co-authored-by: Vince Montalbano <vince.montalbano@gmail.com>

Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/666
Reviewed-by: justusbunsi <justusbunsi@noreply.gitea.com>
Co-authored-by: vjm <vjm@noreply.gitea.com>
Co-committed-by: vjm <vjm@noreply.gitea.com>

unittests/act_runner/serviceaccount-job.yaml

@@ -0,0 +1,42 @@
+suite: actions template | serviceaccount-job
+release:
+  name: gitea-unittests
+  namespace: testing
+templates:
+  - templates/gitea/act_runner/serviceaccount-job.yaml
+tests:
+  - it: doesn't renders a ServiceAccount by default
+    template: templates/gitea/act_runner/serviceaccount-job.yaml
+    asserts:
+      - hasDocuments:
+          count: 0
+  - it: renders a ServiceAccount
+    template: templates/gitea/act_runner/serviceaccount-job.yaml
+    set:
+      actions:
+        enabled: true
+        provisioning:
+          enabled: true
+      persistence:
+        enabled: true
+        mount: true
+    asserts:
+      - hasDocuments:
+          count: 1
+      - containsDocument:
+          kind: ServiceAccount
+          apiVersion: v1
+          name: gitea-unittests-actions-token-job
+  - it: doesn't renders a ServiceAccount when criteria met BUT actions are not enabled
+    template: templates/gitea/act_runner/serviceaccount-job.yaml
+    set:
+      actions:
+        enabled: false
+        provisioning:
+          enabled: true
+      persistence:
+        enabled: true
+        mount: true
+    asserts:
+      - hasDocuments:
+          count: 0