Cannot save the namespace in docker file system

### Search before asking

- [X] I had searched in the [issues](https://github.com/apache/incubator-kvrocks/issues) and found no similar issues.

### Version

2.3.0; 2.2.0

### Minimal reproduce step

root@df063bf88c13:/data# redis-cli -h kvrocks -p 6666 -a workitemadmin
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
kvrocks:6666> namespace add ns1 my_token
(error) rename file encounter error: Device or resource busy

always Device or resource busy

### What did you expect to see?

namespace add ok.

### What did you see instead?

Device or resource busy

### Anything Else?

_No response_

### Are you willing to submit a PR?

- [X] I'm willing to submit a PR!

Start by reproducing the failure with redis-cli against Kvrocks in Docker using the namespace add ns1 my_token command, then trace the namespace-add path that reports the rename-file error. Done means namespace creation succeeds on the affected Docker filesystem and the regression is covered by an appropriate test.

Written by the indexing model from the issue text.