use VoteState::deserialize() everywhere

[2501babe]

Problem

in #34829 and #34972 we implemented VoteState::deserialize_into(), a custom parser intended to be suitable for usage in a bpf context. we want to use the new parser everywhere because, with some optimizations, it is 7-20x faster than bincode depending on the input

HANA custom vs bincode
* we win: 10000, they win: 0
* our max 22.422µs, their max 471.89µs
* our avg 5.76µs, their avg 35.956µs
* avg speedup 30.195µs

it also uses half as much memory for V1_14_11 because conversion to Current happens during parsing

Summary of Changes

use VoteState::deserialize_into() as the new implementation for VoteState::deserialize(). we also remove the check for prior_voters sparsity that wouldnt exist in bincode and remove unnecessary uses of serialized_size() which drastically improve runtime

once approved, this wont be merged immediately. the plan is to cherrypick the new parser into a 1.17 codebase and run that as a validator on mainnet for a few epochs to confirm everything works well

more detail in issue (fixes #35101)

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (8363ebf) 81.6% compared to head (b86cd45) 81.6%.
Report is 95 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #35079   +/-   ##
=======================================
  Coverage    81.6%    81.6%           
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  Files         831      831           
  Lines      224924   224959   +35     
=======================================
+ Hits       183647   183724   +77     
+ Misses      41277    41235   -42     

[willhickey]

This repository is no longer in use. Please re-open this pull request in the agave repo: https://github.com/anza-xyz/agave