DestructivelyPrioritizeReplacementCandidates consumes AND DESTROYS an array of possible replacement candidates with their last known existence times, the primary digest the user actually asked for, and the corresponding uncompressed digest (if known, possibly equal to the primary digest), and returns an appropriately prioritized and/or trimmed result suitable for a return value from types.BlobInfoCache.CandidateLocations.

CandidateWithTime is the input to types.BICReplacementCandidate prioritization.