Remove fsGroup from container security contexts

[kevensen]

Resolves #57

[kevensen]

/gcbrun

[kevensen]

• [x] Test deploy via Terraform with Git repo and that CV returns violations
• [ ] Test deploy via Terraform with GCS and that CV returns violations
• [x] Test deploy via Helm only with Git repo and that CV returns violations
• [ ] Test deploy via Helm only with GCS and that CV returns violations

[kevensen]

/gcbrun

[kevensen]

/gcbrun

[kevensen]

/gcbrun