feat: configurable annotations for gitea StatefulSet (#315)

Fixes #314

Right now, the gitea StatefulSet does not allow any annotations to be configured via the helmchart - see https://gitea.com/gitea/helm-chart/src/tag/v5.0.4/templates/gitea/statefulset.yaml#L4-L6

My use case:

I am trying to use Reloader (https://github.com/stakater/Reloader) so that I can configure my values.yaml such that i can set some annotations on the StatefulSet and thus Reloader can rollout a restart of gitea StatefulSet whenever a watched secret or configmap is updated.

Co-authored-by: Tarun Gupta Akirala <tarugupta.92@gmail.com>
Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/315
Reviewed-by: techknowlogick <techknowlogick@gitea.io>
Reviewed-by: justusbunsi <justusbunsi@noreply.gitea.io>
Co-authored-by: takirala <takirala@noreply.gitea.io>
Co-committed-by: takirala <takirala@noreply.gitea.io>

templates/gitea/statefulset.yaml

@@ -2,6 +2,10 @@ apiVersion: apps/v1
 kind: StatefulSet
 metadata:
   name: {{ include "gitea.fullname" . }}
+  annotations:
+    {{- if .Values.statefulset.annotations }}
+    {{- toYaml .Values.statefulset.annotations | nindent 4 }}
+    {{- end }}
   labels:
     {{- include "gitea.labels" . | nindent 4 }}
 spec: