[Feature][python] Find a good way to change process definition name in python api

### Search before asking

- [X] I had searched in the [issues](https://github.com/apache/dolphinscheduler/issues?q=is%3Aissue) and found no similar feature requirement.

### Description

Separate from #6407, We still **DO NOT** a good way to update `project` or `process_definition_name`, it would create new workflow when their changed, maybe we should find a good way to change those binding name

### Use case

_No response_

### Related issues

_No response_

### Are you willing to submit a PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)

Start by tracing the Python API path that binds project and process_definition_name to an existing workflow. Clarify the intended update semantics and how identity is preserved; done means changing either name updates the existing workflow instead of creating a new one.

Written by the indexing model from the issue text.