PR #97052 - changefeedccl: Fix initial scan checkpointing

[cockroach-teamcity]

Exalate commented:

Related PR: cockroachdb/cockroach#97052
Commit: cockroachdb/cockroach@e847e63
Informs: cockroachdb/cockroach#96959

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Release note (enterprise change): Fix a bug in changefeeds, where
long running initial scans will fail to generate checkpoint.
Failure to generate checkpoint is particularly bad if the
changefeed restarts for whatever reason. Without checkpoints,
the changefeed will restart from the beginning, and in the worst
case, when exporting substantially sized tables, changefeed
initial scan may have hard time completing.

Jira Issue: DOC-7015

[exalate-issue-sync]

Mike Lewis (mikeCRL) commented:
Routed to CDC based on cockroach package https://cockroachlabs.atlassian.net/wiki/spaces/ED/pages/2934931562/Routing+issues+to+Product+Areas