### What problem does this PR solve?
Allow create datasets with parse_type == 1/None and chunk_method, or
parse_type == 2 and pipeline_id.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
1. Split dataset api to gateway and service, and modify web UI to use
restful http api.
2. Old KB releated APIs are commented.
### Type of change
- [x] Refactoring
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Co-authored-by: Yingfeng <yingfeng.zhang@gmail.com>
### What problem does this PR solve?
1. Split dataset api to gateway and service, and modify web UI to use
restful http api.
2. Old KB releated APIs are commented.
### Type of change
- [x] Refactoring
### What problem does this PR solve?
1. Split dataset api to gateway and service, and modify web UI to use
restful http api.
2. Old KB releated APIs are commented.
### Type of change
- [x] Refactoring