Add securityContext and podSecurityContext options in Dragonfly CRD

[maxpain]

Hello. I can't deploy Dragonfly CR since my Kubernetes cluster has a restricted Pod Security profile.

create Pod dragonfly-0 in StatefulSet dragonfly failed error: pods "dragonfly-0" is forbidden: violates PodSecurity "restricted:latest": allowPrivilegeEscalation != false (container "dragonfly" must set securityContext.allowPrivilegeEscalation=false), unrestricted capabilities (container "dragonfly" must set securityContext.capabilities.drop=["ALL"]), runAsNonRoot != true (pod or container "dragonfly" must set securityContext.runAsNonRoot=true), seccompProfile (pod or container "dragonfly" must set securityContext.seccompProfile.type to "RuntimeDefault" or "Localhost")

[Pothulapati]

Would #255 be a fix? It seems to add the ability configure a custom pod security profile, and can you use that to get through the restriction?