ccl/multiregionccl: TestConcurrentAddDropRegions failed

ccl/multiregionccl.TestConcurrentAddDropRegions [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Ci_TestsAwsLinuxArm64_UnitTests/21480220?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Ci_TestsAwsLinuxArm64_UnitTests/21480220?buildTab=artifacts#/) on master @ [953e559bb78d40818509f1324fc10738be55a8f2](https://github.com/cockroachdb/cockroach/commits/953e559bb78d40818509f1324fc10738be55a8f2): ``` === RUN TestConcurrentAddDropRegions I260824 19:20:04.611679 1 (gostd) rand.go:288 [-] 1 random seed: -516958188143218818 test_log_scope.go:172: test logs captured to: /artifacts/tmp/_tmp/7d3f9b446f82b0978f5ed83b44f1c098/logTestConcurrentAddDropRegions2599926287 test_log_scope.go:82: use -show-logs to present logs inline === RUN TestConcurrentAddDropRegions/concurrent-adds test_server_shim.go:95: cluster virtualization disabled due to issue: #156308 (expected label: C-test-failure) ``` <details><summary>Help</summary> <p> See also: [How To Investigate a Go Test Failure \(internal\)](https://cockroachlabs.atlassian.net/l/c/HgfXfJgM) </p> </details> _{[Improve this report!](https://github.com/cockroachdb/cockroach/tree/master/pkg/cmd/bazci/githubpost/issues)} Jira issue: CRDB-67128