[Bug] Prevent AsyncLearner from being elected as Master during initialization

### Before Creating the Bug Report

- [x] I found a bug, not just asking a question, which should be created in [GitHub Discussions](https://github.com/apache/rocketmq/discussions).

- [x] I have searched the [GitHub Issues](https://github.com/apache/rocketmq/issues) and [GitHub Discussions](https://github.com/apache/rocketmq/discussions) of this repository and believe that this is not a duplicate.

- [x] I have confirmed that this bug belongs to the current repository, not other repositories of RocketMQ.

### Runtime platform environment

centos7

### RocketMQ version

5.3.3

### JDK Version

1.8

### Describe the Bug

Prevent AsyncLearner from being elected as Master during initialization

### Steps to Reproduce

Prevent AsyncLearner from being elected as Master during initialization

### What Did You Expect to See?

Prevent AsyncLearner from being elected as Master during initialization

### What Did You See Instead?

Prevent AsyncLearner from being elected as Master during initialization

### Additional Context

_No response_

No source file or test is identified. Start by tracing AsyncLearner initialization and the master-election path in RocketMQ 5.3.3 under the listed CentOS 7 and JDK 8 environment; done means an AsyncLearner cannot become Master during initialization and the behavior is covered by a suitable test.

Written by the indexing model from the issue text.