OSDOCS#13616: Cluster etcd latency requirements

[tmalove]

Version(s):
4.20+

Issue:
OSDOCS-13616

Link to docs preview:
Cluster latency requirements for etcd

QE review:

• QE has approved this change.

This PR replaces #99980

[ocpdocs-previewbot]

🤖 Thu Oct 16 04:12:44 - Prow CI generated the docs preview:

https://100605--ocpdocs-pr.netlify.app/openshift-enterprise/latest/etcd/etcd-practices.html

[openshift-ci]

@tmalove: 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	f6b5fec	link	true	/test validate-portal

Full PR test history. Your PR dashboard.

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[openshift-merge-robot]

PR needs rebase.

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