[Fix][Rest-API] fix submit job api

[liunaijie]

Purpose of this pull request

close #5699

Does this PR introduce any user-facing change?

How was this patch tested?

use postman

Check list

• 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
• If you are contributing the connector code, please check that the following files are updated:
  1. Update change log that in connector document. For more details you can refer to connector-v2
  2. Update plugin-mapping.properties and add new connector information in it
  3. Update the pom file of seatunnel-dist
• Update the release-note.

[Hisoka-X]

Could you add a test case for this? Seem like this is a very important feature we shouldn't missed. It's weird we don't have a test case to cover it. cc @liugddx

[liunaijie]

Could you add a test case for this? Seem like this is a very important feature we shouldn't missed. It's weird we don't have a test case to cover it. cc @liugddx

reuse the RestApiIT, but change something.

1. remove Common.setDeployMode before startup
   when start the st cluster with ./bin/seatunnel-cluster.sh -d command, the deployMode will be null, so delete this setup to keep consistency

2. remove parameter as they are optional when submit job.
   when submit job i think they all should be null. when re-store job they need have value.

[ruanwenjun]

LGTM

[Hisoka-X]

Thanks @liunaijie for fix! BTW, the test case you added are very important!