[I] [Feature][Manager] Fix bug in DolphinScheduler engine [inlong]

[via GitHub]

emptyOVO opened a new issue, #11531:
URL: https://github.com/apache/inlong/issues/11531

   ### Description
   
   The `start()` method in DolphinScheduler engine is never used, which cause 
it didn't correct manage the project in DS
   
   * normaly when DS engine begin, it should create a project in DS, then 
handle process definition in this project, so `start()` method must be called 
before `register()`, `unregister()`, `update()` method, or the project code 
will never be initialize correctly
   
![image](https://github.com/user-attachments/assets/dec3b400-517b-4fdf-9eea-8a5a79ee2b55)
   
   
   
   ### Use case
   
   _No response_
   
   ### Are you willing to submit PR?
   
   - [X] 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)
   


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