perf: batch verification for agreement votes (phase 3)

[algonautshant]

This is the phase 3 of batch verification for agreement votes This PR includes:

• BatchVerifyOneTimeSignatures: which takes a collection of votes to verify the signature (each with 3 sigs) in one verification batch.
• Channels the signature verification from the agreement to the exec pool through StreamToBatch to batch the signature checks.
• Changes StreamToBatch to return context.Canceled` error with jobs and log an error in the event the exec pool returns the error.

The results compared to master are as follows:

TODO: confirm tests exists for upstream users of the vote verification

[codecov[bot]]

Codecov Report

Merging #5222 (68795d9) into master (8b19c62) will increase coverage by 0.10%. Report is 57 commits behind head on master. The diff coverage is 94.95%.

@@            Coverage Diff             @@
##           master    #5222      +/-   ##
==========================================
+ Coverage   54.95%   55.05%   +0.10%     
==========================================
  Files         463      464       +1     
  Lines       64476    64578     +102     
==========================================
+ Hits        35432    35554     +122     
+ Misses      26661    26649      -12     
+ Partials     2383     2375       -8     

Files Changed	Coverage Δ
node/node.go	4.16% <0.00%> (ø)
agreement/vote.go	79.16% <80.95%> (-4.17%)	:arrow_down:
util/execpool/stream.go	96.38% <91.30%> (-2.50%)	:arrow_down:
agreement/asyncVoteVerifier.go	100.00% <100.00%> (+8.82%)	:arrow_up:
agreement/bundle.go	88.09% <100.00%> (+1.58%)	:arrow_up:
agreement/cryptoVerifier.go	72.43% <100.00%> (+0.83%)	:arrow_up:
agreement/pseudonode.go	72.84% <100.00%> (-0.88%)	:arrow_down:
agreement/service.go	85.98% <100.00%> (ø)
agreement/voteBatch.go	100.00% <100.00%> (ø)
crypto/onetimesig.go	80.50% <100.00%> (+4.34%)	:arrow_up:
... and 1 more

... and 11 files with indirect coverage changes

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[algorandskiy]

closed-opened to rerun licence/cla

[algorandskiy]

@algonautshant could you re-merge master?

[cce]

Can revisit later