[Enhancement] Fix util.getIP return 127.0.0.1 issue on 4.9.x

### Before Creating the Enhancement Request

- [x] I have confirmed that this should be classified as an enhancement rather than a bug/feature.

### Summary

https://github.com/apache/rocketmq/pull/5856

Can this fix be merged into the 4.9.x branch?

### Motivation

https://github.com/apache/rocketmq/issues/5740

This problem still exists on 4.9.x

### Describe the Solution You'd Like

/

### Describe Alternatives You've Considered

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### Additional Context

_No response_

Start by reviewing pull request #5856 and issue #5740, then check how util.getIP behaves on the 4.9.x branch. Done means the fix from the referenced pull request is appropriately applied to 4.9.x and the reported 127.0.0.1 behavior is resolved.

Written by the indexing model from the issue text.