PR #107553 - rangefeed: add scheduler based rangefeed processor

[cockroach-teamcity]

Exalate commented:

Related PR: cockroachdb/cockroach#107553
Commit: cockroachdb/cockroach@5c2f80c
Epic: https://cockroachlabs.atlassian.net/browse/CRDB-26372

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Release note (performance improvement): Added scheduler based
rangefeed processor which improves rangefeed and changefeed
performance for very large tables. New processor is disabled by
default, but can be enabled via kv.rangefeed.scheduler.enabled
cluster setting.

Jira Issue: DOC-8776

Epic CRDB-39959

[exalate-issue-sync]

Mike Lewis (mikeCRL) commented:
Epic has Doc Needed = None. Confirm and close if needed.