[Flow EVM] replace block.TransactionHashes with TransactionHashRoot

[ramtinms]

This PR depreciate the TransactionHashes field in the block and instead includes the root hash of all transaction hashes emitted during the transaction execution.

The block proposal keeps the list of tx hashes.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 59.42029% with 28 lines in your changes missing coverage. Please review.

Project coverage is 41.48%. Comparing base (9ea6fae) to head (76ea3b8).

Files	Patch %	Lines
fvm/evm/types/block.go	62.50%	20 Missing and 1 partial ⚠️
fvm/evm/types/utils.go	37.50%	5 Missing ⚠️
utils/unittest/execution_state.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6222      +/-   ##
==========================================
- Coverage   41.48%   41.48%   -0.01%     
==========================================
  Files        1978     1978              
  Lines      140843   140863      +20     
==========================================
+ Hits        58433    58439       +6     
- Misses      76335    76351      +16     
+ Partials     6075     6073       -2     

Flag	Coverage Δ
unittests	41.48% <59.42%> (-0.01%)	⬇️

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[turbolent]

Looks good from a Go-perspective! Can't say much regarding the business logic change