Optmize: eliminates the dependency of abstract class on implementation class

[PleaseGiveMeTheCoke]

• [ ] I have registered the PR changes.

Ⅰ. Describe what this PR did

eliminates the dependency of AbstractNettyRemotingClient on RmNettyRemotingClient and TmNettyRemotingClient

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews