[Improvement] [Seatunnel-web] Add API to get and update job definition.

[arshadmohammad]

As part of f45dacd we have added single API to create a job. There should be corresponding get and update APIs also. So added following two APIs
GET /seatunnel/api/v1/job/get/{jobVersionId}
PUT /seatunnel/api/v1/job/update/{jobVersionId}

Purpose of this pull request

Check list

• Code changed are covered with tests, or it does not need tests for reason:
• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs

[arshadmohammad]

Tested the newly added API though test case and run all the integration tests.