metrics(ticdc): add resolved ts and add changefeed to dataflow (#4038)

[ti-chi-bot]

This is an automated cherry-pick of #4038

What problem does this PR solve?

• fix etcd worker txn size heatmap
• add owner resolved ts metrics
• add changefeed to dataflow
• add PD uptime
• add PD leader history
• add etcd metrics, eg, mvcc db size, etc.

Check List

Tests

• Manual test (add detailed scripts or steps below)

Import to grafana.

Related changes

• Need to cherry-pick to the release branch

Release note

None

[ti-chi-bot]

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[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (release-5.0@39ebddf). Click here to learn what that means.
The diff coverage is n/a.

@@               Coverage Diff                @@
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  Hits                   ?      10749           
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  Partials               ?        951           

[overvenus]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 947c938