[Feature][RestAPI] Support submit job with seatunnel style hocon format config

[CosmosNi]

#7925

Purpose of this pull request

Does this PR introduce any user-facing change?

How was this patch tested?

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 plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config
• Update the release-note.

[Hisoka-X]

cc @liugddx

[Hisoka-X]

Please update the docs. Thanks @CosmosNi !

[liugddx]

Thanks @CosmosNi ! Can you add a test case for normal submission? like https://github.com/apache/seatunnel/blob/ccd6a2a11e8d8198258301c81d71e8ed306e917a/seatunnel-e2e/seatunnel-engine-e2e/connector-seatunnel-e2e-base/src/test/java/org/apache/seatunnel/engine/e2e/ClusterSeaTunnelContainer.java#L123C17-L123C45

[liunaijie]

I see this pr is put the config string to request body.
Do we conside using multipart/form-data upload the file into a config_file (or other name) parameter

[Hisoka-X]

Do we conside using multipart/form-data upload the file into a config_file (or other name) parameter

Ok for me, but I think this should be another feature. Please create an issue for this.

[liunaijie]

Do we conside using multipart/form-data upload the file into a config_file (or other name) parameter

Ok for me, but I think this should be another feature. Please create an issue for this.

Yes, it should be in another pr, just point it in this issue.

[Hisoka-X]

Thanks @CosmosNi ! Please update the doc too.

[CosmosNi]

@Hisoka-X @liugddx PTAL，thanks

[Hisoka-X]

LGTM if ci passes. Thanks @CosmosNi ! cc @liugddx

[liugddx]

LGTM Thanks @CosmosNi !