[Fix][connector-http] fix when post have param

[CosmosNi]

fix when post have param.
#8431

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.

[CosmosNi]

@hailin0 @Hisoka-X PTAL

[CosmosNi]

@Hisoka-X PTAL

[Hisoka-X]

After discussing with @CosmosNi offline, we believe that the current behavior of param is incorrect, and we need to:

1. Correct the existing meaning of params, which represents the parameters after the URL.
2. The body supports two types: JSON or form, decided by the type configured by the user (i.e., the user needs to configure the corresponding header, with JSON as the default).
3. The values of pagination parameters can be injected into either params or the body.
4. Add configuration to support rolling back to the old behavior.

cc @hailin0