feat: set runAsNonRoot and seccompProfile where missing

What does this MR do?

Sets runAsNonRoot and seccompProfile where missing

runAsNonRoot and seccompProfile are not yet consistently added across the various GitLab services. The attached changes allow GitLab to run in a security constrained namespace with Pod Security Admission set to restricted pod-security.kubernetes.io/enforce: restricted).

Related issues

Author checklist

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Required

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• Merge Request Title and Description are up to date, accurate, and descriptive.
• MR targeting the appropriate branch.
• MR has a green pipeline.
• Documentation created/updated.
• Tests added/updated, and test plan for scenarios not covered by automated tests.
• Equivalent MR/issue for omnibus-gitlab opened.

Reviewers checklist

• MR has a green pipeline on https://gitlab.com/gitlab-org/charts/gitlab.
• Consider downstream impact to the Operator, as per evaluating impact from changes to GitLab chart.