Fixes https://emqx.atlassian.net/browse/EMQX-12357

Release version: v/e5.7.1

Summary

The original issue originated when the connector process (emqx_resource_manager) was stuck trying to start, and an API call to remove the action/source would arrive, timing out in a gen_statem:call.

Now, the recommended workaround in such situations is to first stop the connector before disabling/removing the action/source. Now, when stopping a connector, if the stop call times out, we forcefully kill the process.

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|breaking)-<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