[enterprise-4.12] OBSDOCS-1413: Document how to verify if receivers/exporters are sending/receiving data based on the OTEL Collector metrics

[openshift-cherrypick-robot]

This is an automated cherry-pick of #85688

/assign skopacz1

[openshift-ci-robot]

@openshift-cherrypick-robot: Ignoring requests to cherry-pick non-bug issues: OBSDOCS-1413

In response to this:

This is an automated cherry-pick of #85688

/assign skopacz1

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[openshift-ci]

@openshift-cherrypick-robot: 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/validate-portal	8a44059	link	true	/test validate-portal

Full PR test history. Your PR dashboard.

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[max-cx]

⚠️ This PR can be closed because I opened #96318.