0504 delete statsd all together

[zmstone]

Fixes https://emqx.atlassian.net/browse/EMQX-9313

Summary

🤖 Generated by Copilot at 3085ded

This pull request removes the emqx_statsd application from the EMQ X Broker, as it is no longer needed or maintained. It deletes all the files related to the application, and updates the modules that depend on or reference it. It also improves the static analysis of the broker APIs by ignoring some deleted modules and providing more error information.

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

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

[thalesmg]

🔥

[yanzhiemq]

Bug Fixes

• Deleted emqx_statsd application.

[yanzhiemq]

修复

• 删除了 emqx_statsd 应用。