release-26.3: kv/kvserver: TestStoreRangeSplitRaftSnapshotAfterRHSRebalanced failed

kv/kvserver.TestStoreRangeSplitRaftSnapshotAfterRHSRebalanced [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Ci_TestsAwsLinuxArm64_UnitTests/21518598?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Ci_TestsAwsLinuxArm64_UnitTests/21518598?buildTab=artifacts#/) on release-26.3 @ [93a1fa0aa6b5880d1eca6c326df3a38fc536d402](https://github.com/cockroachdb/cockroach/commits/93a1fa0aa6b5880d1eca6c326df3a38fc536d402):

```
=== RUN TestStoreRangeSplitRaftSnapshotAfterRHSRebalanced
test_log_scope.go:172: test logs captured to: /artifacts/tmp/_tmp/37ddc8e37e5448832e32de57f39c38ec/logTestStoreRangeSplitRaftSnapshotAfterRHSRebalanced2011714990
test_log_scope.go:82: use -show-logs to present logs inline
test_server_shim.go:146: using test tenant configuration from testserver factory defaults
client_split_test.go:4672: condition failed to evaluate within 45s: store0 and store2 have different keys: map[������:{} �������:{} ��������:{} ���������:{} ����������:{} �����������:{} ������������:{} �������������:{} ��������������:{} ���������������:{}] != map[]

goroutine dump: /artifacts/tmp/_tmp/37ddc8e37e5448832e32de57f39c38ec/goroutine_dump_1119028609.txt
panic.go:694: -- test log scope end --
test logs left over in: /artifacts/tmp/_tmp/37ddc8e37e5448832e32de57f39c38ec/logTestStoreRangeSplitRaftSnapshotAfterRHSRebalanced2011714990
--- FAIL: TestStoreRangeSplitRaftSnapshotAfterRHSRebalanced (47.68s)
```
Help

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

/cc @cockroachlabs/kv-triage

[This test on roachdash](https://roachdash.crdb.dev/?filter=status:open%20t:.*TestStoreRangeSplitRaftSnapshotAfterRHSRebalanced.*&sort=title+created&display=lastcommented+project) | [Improve this report!](https://github.com/cockroachdb/cockroach/tree/master/pkg/cmd/bazci/githubpost/issues)

Jira issue: CRDB-68437

Start with pkg/kv/kvserver/client_split_test.go around line 4672 and run TestStoreRangeSplitRaftSnapshotAfterRHSRebalanced on release-26.3 at commit 93a1fa0aa6b5880d1eca6c326df3a38fc536d402. Inspect the linked TeamCity logs, artifacts, and goroutine dump to determine why store0 and store2 diverge; done means the test completes successfully without the reported timeout.

Written by the indexing model from the issue text.