fix(plugins): use emqx:running_nodes for multicall operations

[thalesmg]

Fixes https://emqx.atlassian.net/browse/EMQX-10079

Summary

🤖 Generated by Copilot at a721b23

Added a new module emqx_mgmt_api_plugins_proto_v2 to support cluster-wide plugin management. Updated the emqx_mgmt_api_plugins module to use the new protocol and handle errors. Marked the emqx_mgmt_api_plugins_proto_v1 module as deprecated.

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

[yanzhiemq]

Bug Fixes

• Fixed an issue where the plugin status REST API of a node would still include the cluster node status after the node left the cluster.

[yanzhiemq]

修复

• 修复了某个节点离开集群后，其插件状态 REST API 仍会包含集群节点状态问题。