[enterprise-4.15] OBSDOCS-212: Add docs for http server receiver input

[openshift-cherrypick-robot]

This is an automated cherry-pick of #71780

/assign abrennan89

[openshift-ci-robot]

@openshift-cherrypick-robot: Ignoring requests to cherry-pick non-bug issues: OBSDOCS-212

In response to this:

This is an automated cherry-pick of #71780

/assign abrennan89

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[ocpdocs-previewbot]

🤖 Fri Mar 01 15:53:23 - Prow CI generated the docs preview:
https://72460--ocpdocs-pr.netlify.app

[openshift-ci]

@openshift-cherrypick-robot: all tests passed!

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