feat: add dind rootless flags (#113)

Add switch for rootless accounting with:

```
statefulset:
  dind:
    rootless: true | false
    uid: ""
```
This is to set the liveness and readiness probes correctly.

---------

Co-authored-by: DaanSelen <dselen@systemec.nl>
Reviewed-on: https://gitea.com/gitea/helm-actions/pulls/113
Reviewed-by: techknowlogick <9+techknowlogick@noreply.gitea.com>
Reviewed-by: wxiaoguang <29147+wxiaoguang@noreply.gitea.com>

templates/statefulset.yaml

@@ -60,13 +60,21 @@ spec:
               command:
                 - /usr/bin/test
                 - -S
+                {{- if .Values.statefulset.dind.rootless }}
+                - /run/user/{{ .Values.statefulset.dind.uid | default 1000 }}/docker.sock
+                {{- else }}
                 - /var/run/docker.sock
+                {{- end }}
           livenessProbe:
             exec:
               command:
                 - /usr/bin/test
                 - -S
+                {{- if .Values.statefulset.dind.rootless }}
+                - /run/user/{{ .Values.statefulset.dind.uid | default 1000 }}/docker.sock
+                {{- else }}
                 - /var/run/docker.sock
+                {{- end }}
           resources:
             {{- toYaml .Values.statefulset.resources | nindent 12 }}
           volumeMounts: