Copy slice when setting block hash list - Port

[janezpodhostnik]

Port of:

• [EVM] Offchain package - part 1 #6544 (needed as a dependency)
• Copy slice when setting block hash list #6734

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 65.43210% with 56 lines in your changes missing coverage. Please review.

Project coverage is 41.56%. Comparing base (4162017) to head (cf177b5).

Files with missing lines	Patch %	Lines
fvm/evm/types/result.go	0.00%	33 Missing ⚠️
fvm/evm/offchain/blocks/blocks.go	73.13%	12 Missing and 6 partials ⚠️
fvm/evm/offchain/blocks/meta.go	93.02%	2 Missing and 1 partial ⚠️
fvm/evm/events/events.go	66.66%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            v0.37    #6740    +/-   ##
========================================
  Coverage   41.55%   41.56%            
========================================
  Files        2026     2028     +2     
  Lines      181069   181202   +133     
========================================
+ Hits        75248    75318    +70     
- Misses      99595    99651    +56     
- Partials     6226     6233     +7     

Flag	Coverage Δ
unittests	41.56% <65.43%> (+<0.01%)	⬆️

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