added benchmarks for sumhash in the merklearray

[algonathan]

Summary

adding sumhash benchmarks to the merklearray

Test Plan

[codecov-commenter]

Codecov Report

Merging #3144 (a416c92) into feature/dilithium-scheme-integration (6498416) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@                           Coverage Diff                            @@
##           feature/dilithium-scheme-integration    #3144      +/-   ##
========================================================================
- Coverage                                 43.50%   43.50%   -0.01%     
========================================================================
  Files                                       402      402              
  Lines                                     90345    90345              
========================================================================
- Hits                                      39309    39303       -6     
- Misses                                    44691    44694       +3     
- Partials                                   6345     6348       +3     

Impacted Files	Coverage Δ
crypto/merkletrie/trie.go	66.42% <0.00%> (-2.19%)	⬇️
crypto/merkletrie/node.go	91.62% <0.00%> (-1.87%)	⬇️
catchup/service.go	69.59% <0.00%> (-1.01%)	⬇️
data/abi/abi_type.go	90.90% <0.00%> (-0.91%)	⬇️
ledger/acctupdates.go	64.15% <0.00%> (-0.60%)	⬇️
network/wsNetwork.go	62.76% <0.00%> (+0.18%)	⬆️
catchup/peerSelector.go	100.00% <0.00%> (+1.04%)	⬆️
ledger/tracker.go	78.09% <0.00%> (+1.90%)	⬆️
ledger/blockqueue.go	85.05% <0.00%> (+4.02%)	⬆️

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