gc(ticdc): add min service gc safe point metrics (#10553) #10751
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This is an automated cherry-pick of #10553
What problem does this PR solve?
Issue Number: ref #10463
What is changed and how it works?
ticdc uses min service gc safe point to check whether data is GCed, this PR adds min service gc safe point metrics to ticdc dashboard, and with this metric, the user can easily understand why changefeed failed with
ErrSnapshotLostByGC
errorCheck List
Tests
Questions
Will it cause performance regression or break compatibility?
Do you need to update user documentation, design documentation or monitoring documentation?
Release note