[enterprise-4.12] OBSDOCS-721: add Vector to monitoring components list

[openshift-cherrypick-robot]

This is an automated cherry-pick of #70134

/assign bburt-rh

[openshift-ci-robot]

@openshift-cherrypick-robot: Ignoring requests to cherry-pick non-bug issues: OBSDOCS-721

In response to this:

This is an automated cherry-pick of #70134

/assign bburt-rh

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[ocpdocs-previewbot]

🤖 Fri Jan 12 17:30:02 - Prow CI generated the docs preview: https://70187--ocpdocs-pr.netlify.app

[openshift-ci]

@openshift-cherrypick-robot: all tests passed!

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