Myasuka opened a new pull request #7544: [FLINK-11366][tests] Port
TaskManagerMetricsTest to new code base
URL: https://github.com/apache/flink/pull/7544
## What is the purpose of the change
Port `TaskManagerMetricsTest` to new code base.
## Brief change log
- Move
Myasuka opened a new pull request #7544: [FLINK-11366][tests] Port
TaskManagerMetricsTest to new code base
URL: https://github.com/apache/flink/pull/7544
## What is the purpose of the change
Port `TaskManagerMetricsTest` to new code base.
## Brief change log
- Move