Support for serviceAccountName in StatefulSets

[devkmsg]

Is your feature request related to a problem? Please describe.

My k8s cluster requires the use of a security policy, so I am getting this error: StatefulSet mycluster-leader failed error: pods "mycluster-leader-0" is forbidden: PodSecurityPolicy: unable to admit pod: []

Describe the solution you'd like

Add support for setting serviceAccountName in the StatefulSet

Describe alternatives you've considered

What version of redis-operator are you using? redis-operator version: 0.10.0

Additional context