refactor: HTTP bridge into the emqx_bridge_http application

[kjellwinblad]

Fixes:
https://emqx.atlassian.net/browse/EMQX-9568

Summary

🤖 Generated by Copilot at 6449de5

Add HTTP bridge connector support to emqx_authn, emqx_authz, and emqx_bridge_gcp_pubsub applications. Refactor the module name of emqx_connector_http to emqx_bridge_http_connector and create a new application emqx_bridge_http to encapsulate the common logic and configuration. Update the versions of the affected applications and add documentation and testing files.

PR Checklist

Please convert it to a draft if any of the following conditions are not met. Reviewers may skip over until all the items are checked:

• [] Added tests for the changes
• Changed lines covered in coverage report
• Change log has been added to changes/{ce,ee}/(feat|perf|fix)-<PR-id>.en.md files
• For internal contributor: there is a jira ticket to track this change
• If there should be document changes, a PR to emqx-docs.git is sent, or a jira ticket is created to follow up
• Schema changes are backward compatible

[id]

--> #11253