cockroachdb / cockroachdb/cockroach
kvserver: remove special case handling of Liveness range
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Description
Various places in the code directly use the liveness keys to make decisions to reduce the use of the liveness range. Some of these are being removed as part of #101023, however, there are still places that directly reference `NodeLivenessPrefix`, `NodeLivenessMax`, or `NodeLivenessSpan` to make decisions.
We should audit and clean up any incorrect usage of this. Generally, the usage concerns behavior around splits, gossiping, prioritization and requiring 1PC. Most of these will not be necessary anymore.
Jira issue: CRDB-27116
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