[Bug] Single log file size limit failed

**BUG REPORT**

1. Please describe the issue you observed:

- What did you do (The steps to reproduce)?
Taking mqAdmin as an example, when I call **SetMQAdminLogFileNumAndSize** to trigger the **setLogFileSizeAndNum** of **DefaultMQClient**, I find that the log is not sharded.


- What did you expect to see?

As expected, there should be 4 logs per 3M

- What did you see instead?

The size of a single file exceeds 3M

2. Please tell us about your environment:

- What is your OS?

macos/arm

- What is your client version?
latest

- What is your RocketMQ version?
latest

3. Other information (e.g. detailed explanation, logs, related issues, suggestions on how to fix, etc):

fix: use set_rotation_size function provided by boost

Start by tracing SetMQAdminLogFileNumAndSize into DefaultMQClient and setLogFileSizeAndNum, then inspect how the log rotation size is applied. The report points to Boost's set_rotation_size function as the proposed direction. Done means the configured limit is respected and the expected four logs of about 3M each are produced on macOS/ARM.

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