Missing group configuration for securityContext

What is the issue

Add optional support to configure the group specific configuration runAsGroup and supplementalGroups for K8S deployments that have pod security policies that requires explicit configuration.

How to reproduce

Deploy the helm chart on a K8S instance that has PSP that requires explicit configuration

admission webhook "validation.gatekeeper.sh" denied the request: [denied by psp-pods-allowed-supplemental-groups-ranges] Container test-runner is attempting to run without a required securityContext/supplementalGroups
[denied by psp-pods-allowed-supplemental-groups-ranges] Container configure is attempting to run without a required securityContext/supplementalGroups

How to fix

Make runAsGroup and supplementalGroups as optional configurable