ccl/multiregionccl: TestMrSystemDatabaseUpgrade failed

ccl/multiregionccl.TestMrSystemDatabaseUpgrade [failed](https://mesolite.cluster.engflow.com/invocations/default/3f2f7d8e-3d6f-490c-a9e2-af162a846f16?testReportRun=3&testReportShard=9&testReportAttempt=1#targets-Ly9wa2cvY2NsL211bHRpcmVnaW9uY2NsOm11bHRpcmVnaW9uY2NsX3Rlc3Q=) on master @ [1603dd786f0f2588806ac199e7371a2403251208](https://github.com/cockroachdb/cockroach/commits/1603dd786f0f2588806ac199e7371a2403251208):

```
=== RUN TestMrSystemDatabaseUpgrade
test_log_scope.go:172: test logs captured to: outputs.zip/logTestMrSystemDatabaseUpgrade388481336
test_log_scope.go:82: use -show-logs to present logs inline
test_server_shim.go:95: cluster virtualization disabled due to issue: #156308 (expected label: C-test-failure)
multiregion_system_table_test.go:598: error executing query="SET CLUSTER SETTING version = crdb_internal.node_executable_version();" args=[]: pq: have retried transaction: unnamed (id: b470ec66-4527-4348-8f59-3721ecf39873) 101 times, most recently because of the retryable error: TransactionRetryWithProtoRefreshError: TransactionAbortedError(ABORT_REASON_TIMESTAMP_CACHE_REJECTED): "unnamed" meta={id=b470ec66 key=/Tenant/11/Table/6/1/"version"/0 iso=Serializable pri=100.00000000 epo=0 ts=1784786560.567874768,2 min=1784786559.757385038,0 seq=2} lock=true stat=PENDING rts=1784786560.567874768,2 gul=1784786560.257385038,0 obs={n1@1784786559.757843968,0}. Terminating retry loop and returning error due to max retry limit (100). Rollback error: .
panic.go:694: -- test log scope end --
test logs left over in: outputs.zip/logTestMrSystemDatabaseUpgrade388481336
--- FAIL: TestMrSystemDatabaseUpgrade (80.12s)
```

Parameters:
- attempt=1
- run=3
- shard=9
Help

See also: [How To Investigate a Go Test Failure \(internal\)](https://cockroachlabs.atlassian.net/l/c/HgfXfJgM)

Same failure on other branches

- #171799 release-26.3: ccl/multiregionccl: TestMrSystemDatabaseUpgrade failed [C-test-failure O-robot T-sql-queries branch-release-26.3]

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Jira issue: CRDB-66004