kvserver: deflake TestRangefeedCheckpointsRecoverFromLeaseExpiration

[iskettaneh]

This commit does two things to deflake the test:

1. Takes the MinExpiration into consideration when advancing the clock to cause the epoch lease to expire. This is important after the feature was enabled in: ba758c0
2. Waits for N1's view of N2's lease expiration to match N2's view. This is important in the rare case where N1 tries to increase N2's epoch, but it has a stale view of the lease expiration time.

Fixes: #124178, #123551

Epic: None

Release note: None

[cockroach-teamcity]

This change is 

[arulajmani]

Great job getting to the bottom of this!

Reviewed 1 of 1 files at r1, all commit messages.
Reviewable status: complete! 1 of 0 LGTMs obtained (waiting on @iskettaneh)

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pkg/kv/kvserver/replica_rangefeed_test.go line 1673 at r1 (raw file):

	// Ask another node to increment n2's liveness record, but first, wait until
	// both nodes view on the liveness expiration converge.

nit: This deserves more explanation. Consider rewording to something like:

"but first, wait until n1's liveness state is the same as n2's. Otherwise, the epoch below might get rejected because of mismatching liveness records".

[iskettaneh]

bors r+

[craig]

Build succeeded:

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