changefeedccl,backupccl,*: telemetry counters may be incremented multiple times during txn restarts #91827
Description
Describe the problem
In a number of places we incremental telemetry counters from inside sql.PlanHookRowFns. These functions may be called multiple times in the face of automatic transaction retries, leading to the telemetry counters being erroneously incremented on each retry.
Jira issue: CRDB-21444