Added support for resource requirements in GitOpsService

[anandf]

What type of PR is this?
/kind enhancement

What does this PR do / why we need it:
It was not possible to change the resource requirements and limits for some of the pods like gitops-plugin, cluster and gitops-backend.

Have you updated the necessary documentation?

• Documentation update is required by this PR.
• Documentation has been updated.

Which issue(s) this PR fixes:

Fixes #?

Test acceptance criteria:

• Unit Test
• E2E Test

How to test changes / Special notes to the reviewer:

[openshift-ci]

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[svghadi]

Looks good. Do we need additional logic to handle updates to resources?

[openshift-ci]

@anandf: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/v4.14-kuttl-parallel	87327e1	link	true	/test v4.14-kuttl-parallel
ci/prow/v4.17-kuttl-parallel	87327e1	link	true	/test v4.17-kuttl-parallel
ci/prow/v4.19-kuttl-parallel	87327e1	link	true	/test v4.19-kuttl-parallel

Full PR test history. Your PR dashboard.

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[svghadi]

Superseded by #969