Allow workspace SA to read pod metrics in current namespace

[amisevsk]

What does this PR do?

Adds permissions

- apiGroups:
  - metrics.k8s.io
  resources:
  - pods
  verbs:
  - get
  - list
  - watch

to the workspace ServiceAccount

What issues does this PR fix or reference?

Needed for eclipse-che/che#20800

Is it tested? How?

Create a DevWorkspace and verify workspace role is updated.

PR Checklist

• E2E tests pass (when PR is ready, comment /test v8-devworkspace-operator-e2e, v8-che-happy-path to trigger)
  • v8-devworkspace-operator-e2e: DevWorkspace e2e test
  • v8-che-happy-path: Happy path for verification integration with Che

[amisevsk]

/test v8-devworkspace-operator-e2e

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: amisevsk, JPinkney

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