refactor: local barrier manager use prev epoch to track barrier state

[wenym1]

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What's changed and what's your intention?

Split from #14377 as suggested in #14377 (comment)

Refactor includes the following changes:

• use prev_epoch as the key of barrier state map. Previously we use curr_epoch.
• observe barrier inflight latency when barrier has been collected from all actors. Previously we observe the latency in the collect_barrier rpc handler when we get notified on collecting barriers from all actors.
• maintain failure actor in local barrier worker instead of the managed state.

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[BugenZhao]

LGTM!

[tabVersion]

lgtm

[tabVersion]

any reason we wanna keep this?

[wenym1]

Just to be consistent with the original logic. We can save the error and early return the error when handling inject_barrier.

[yezizp2012]

Good job! LGTM!