[Subtask]: Supports forwarding OpenAPI requests to the master node in master-slave mode.

[wardlican]

Why are the changes needed?

In master-slave mode, requests from the slave node's OpenAPI will be automatically forwarded to the master node.

Close #3963.

Brief change log

Add the RequestForwarder class to intercept and forward requests in http.before.

How was this patch tested?

• [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

• [ ] Add screenshots for manual tests if appropriate

• [ ] Run test locally before making a pull request

Documentation

• Does this pull request introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)