[improve] Add DorisAbstractWriter, Unify DorisSink and DorisBatchSink

[JNSimba]

Proposed changes

Currently, this PR implements batch writing of streamload, #168

However, at the datastream usage level, different sinks pose relatively large barriers to use for users, so we will unify them here.

Abstract DorisAbstractWriter and use parameters sink.write-mode to distinguish different writes

Checklist(Required)

1. Does it affect the original behavior: (Yes/No/I Don't know)
2. Has unit tests been added: (Yes/No/No Need)
3. Has document been added or modified: (Yes/No/No Need)
4. Does it need to update dependencies: (Yes/No)
5. Are there any changes that cannot be rolled back: (Yes/No)

Further comments

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