Add support to define (overwrite) of securityContext or pod security context

[cbugneac-nex]

What this PR does / why we need it:
Add support to define (overwrite) SecurityContext for containers & pod security context.

Which issue(s) this PR fixes (optional, using fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when the PR gets merged):
Fixes #1437

Special notes for your reviewer:

Link helm chart:

$ helm lint ./
==> Linting ./

1 chart(s) linted, 0 chart(s) failed

TODOs:

• squashed commits
• includes documentation
• adds unit tests

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @cbugneac-nex. Thanks for your PR.

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[cbugneac-nex]

/kind feature

[cbugneac-nex]

Hi @aramase @nilekhc please could you review this PR ?

[cbugneac-nex]

Hi @aramase @nilekhc @ritazh @tam7t please could you review this PR when you have time ?

[cbugneac-nex]

Hi @aramase please could you review it once again ?

[cbugneac-nex]

Hi @aramase @nilekhc @ritazh @tam7t please could you review this PR when you have time ?

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: Constantin07 / name: Constantin Bugneac (813d013, 18c78fb)
• ✅ login: cbugneac-nex / name: Constantin Bugneac (d00ff30, 5852ec4, 4e68d06)

[aramase]

Suggested change

	{{- with .Values.podSecurityContext }}
	{{- toYaml . | nindent 8 }}
	{{- end }}
	{{- toYaml .Values.linux.podSecurityContext | nindent 8 }}

[aramase]

Why is privileged: true being moved from container to the pod security context?

[aramase]

same comment as above

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: cbugneac-nex
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[k8s-ci-robot]

PR needs rebase.

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