Chore : Bump ose-kube-rbac-proxy version to 4.15

[varshab1210]

What type of PR is this?

/kind enhancement

What does this PR do / why we need it:

To make ose-kube-rbac-proxy ARM compatible

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:

[svghadi]

/lgtm
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: svghadi

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[varshab1210]

/retest

[varshab1210]

/test v4.19-kuttl-parallel

[varshab1210]

/test v4.19-kuttl-parallel

[varshab1210]

/test v4.19-kuttl-parallel

[varshab1210]

/retest

[openshift-ci]

@varshab1210: 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/v4.19-kuttl-parallel	74cd05b	link	true	/test v4.19-kuttl-parallel
ci/prow/v4.19-kuttl-sequential	74cd05b	link	true	/test v4.19-kuttl-sequential
ci/prow/v4.14-kuttl-parallel	74cd05b	link	false	/test v4.14-kuttl-parallel
ci/prow/v4.14-kuttl-sequential	74cd05b	link	false	/test v4.14-kuttl-sequential
ci/prow/v4.14-e2e	74cd05b	link	true	/test v4.14-e2e

Full PR test history. Your PR dashboard.

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