Improve PD go runtime metrics

## Enhancement Task
### Background
Currently, PD's monitoring related to the Golang runtime lacks sufficient detail to effectively identify runtime-related issues. To address this, we need to enhance the existing Grafana monitoring panels and introduce additional monitoring metrics focused on the Golang runtime.
### Objectives
The primary goal is to refine and expand the TiDB monitoring capabilities to provide more insightful data, which will aid in diagnosing runtime-related problems. The improvements will be implemented by optimizing the existing monitoring panels and adding new ones to cover critical runtime aspects.

details can be found in this: https://github.com/pingcap/tidb/issues/55390
### Task