ROX-31635: Remove observatorium metrics federation

[ebensh]

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ebensh

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[openshift-ci]

@ebensh: The following test 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/e2e	2e9a383	link	true	/test e2e

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