metrics: add changefeed checkepoint catch-up ETA (#3300)#3310

Merged

ti-chi-bot merged 4 commits intopingcap:release-5.1from ti-chi-bot:cherry-pick-3300-to-release-5.1

Nov 10, 2021

+376-119

Commits on Nov 6, 2021

This is an automated cherry-pick of pingcap#3300

overvenus
authored and
ti-chi-bot
committed

Commits on Nov 10, 2021