Reusable resource management

[id]

An effort to split bridges into a connector part and a bridge part.

Several bridges should be able to share a connector pool defined by a single connector. The connectors should be possible to enable and disable similar to how one can disable and enable bridges. There should also be an API for checking the status of a connector and for add/edit/delete connectors similar to the current bridge API.

Fixes:
https://emqx.atlassian.net/browse/EMQX-10953

This is a squashed version of the original PR.

Summary

🤖 Generated by Copilot at 4a89737

This pull request adds support for the kafka bridge type and the emqx_connector plugin in the emqx_bridge plugin. It also improves the test framework, the configuration handling, and the docker images. It updates the version numbers for the bridge plugin and the enterprise edition.

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
• Added property-based tests for code which performs user input validation
• 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
• Created PR to emqx-docs if documentation update is required, or link to a follow-up jira ticket
• Schema changes are backward compatible

Checklist for CI (.github/workflows) changes

• If changed package build workflow, pass this action (manual trigger)
• Change log has been added to changes/ dir for user-facing artifacts update