Topic stats cannot work with transaction_coordinator_assign topic

[codelipenghui]

Describe the bug

Can not create transaction system topic persistent://pulsar/system/transaction_coordinator_assign-partition-1

Reason: Can not create transaction system topic persistent://pulsar/system/transaction_coordinator_assign-partition-1

To Reproduce
Steps to reproduce the behavior:

1. Deploy pulsar cluster
2. Enabled transaction
3. Disabled the topic auto creation
4. init the transaction metadata https://pulsar.apache.org/docs/en/txn-use/
5. Create the missed partitions: bin/pulsar-admin topics create-missed-partitions persistent://pulsar/system/transaction_coordinator_assign
6. get the topic stats
7. See the above error

Expected behavior
The topic stats should work with transaction_coordinator_assign topic

Additional context
Version: the latest branch-2.9

[chenjing1294]

@codelipenghui I still have this problem in apache-pulsar-2.11.0.

[GET] http://node1:8080/admin/v2/persistent/pulsar/system/transaction_coordinator_assign/internalStats

{
    "reason": "Can not create transaction system topic persistent://pulsar/system/transaction_coordinator_assign"
}