TiCDC grafana does not respect the "ticdc_instance" filter

[flowbehappy]

For example:

An extra filter instance=~"$ticdc_instance" should be added.

[tenfyzhong]

After reviewing all the panels, I've identified several that require the addition of an instance filter:

Puller Output Event Rows
Sink Flush Rows
CPU Usage
Goroutine Count
Memory Usage
Open FD Count
Ownership History
Coordinator History
Maintainer Checkpoint Lag
Maintainer Resolved Ts Lag
Subscribed Region Count
Dropped Resolve Lock Tasks / s
Worker Send CheckpointTs Message Count
Redo Write Rows / s
Unresolved Region Request Count

cc @asddongmen