ccl/changefeedccl: TestChangefeedBackfillCheckpoint failed

ccl/changefeedccl.TestChangefeedBackfillCheckpoint failed with artifacts on release-22.1 @ 34e6fcfdc8f3155831305ab4a78f960aaad3e7bc:

=== RUN   TestChangefeedBackfillCheckpoint
    test_log_scope.go:79: test logs captured to: /artifacts/tmp/_tmp/a77002d7c9453d7cd2d382f907780e13/logTestChangefeedBackfillCheckpoint2134013902
    test_log_scope.go:80: use -show-logs to present logs inline
=== CONT  TestChangefeedBackfillCheckpoint
    changefeed_test.go:5440: -- test log scope end --
--- FAIL: TestChangefeedBackfillCheckpoint (541.52s)
=== RUN   TestChangefeedBackfillCheckpoint/enterprise-limit=100_B
    changefeed_test.go:5420: 
            Error Trace:    changefeed_test.go:5420
                                        helpers_test.go:554
            Error:          Received unexpected error:
                            retrying txn failed after 50 attempts. original error: pq: restart transaction: TransactionRetryWithProtoRefreshError: TransactionRetryError: retry txn (RETRY_SERIALIZABLE - failed preemptive refresh due to a conflict: committed value on key /Table/109/1/"foo"/0/766181192725659648/0): "sql txn" meta={id=1ef45b68 key=/Table/109/1/"foo"/0/766179641595625472/0 pri=0.00000000 epo=50 ts=1653890353.444952019,2 min=1653890008.216986178,0 seq=8087} lock=true stat=PENDING rts=1653890344.066420091,0 wto=false gul=1653890008.716986178,0.
            Test:           TestChangefeedBackfillCheckpoint/enterprise-limit=100_B
    --- FAIL: TestChangefeedBackfillCheckpoint/enterprise-limit=100_B (486.62s)

Help

See also: [How To Investigate a Go Test Failure \(internal\)](https://cockroachlabs.atlassian.net/l/c/HgfXfJgM) Parameters in this failure: - TAGS=bazel,gss,deadlock

/cc @cockroachdb/cdc

This test on roachdash | Improve this report!

Jira issue: CRDB-16382

Epic CRDB-11732

cockroachdb / cockroach

ccl/changefeedccl: TestChangefeedBackfillCheckpoint failed #82058