*: Convert slices to arrays instead of copy where possible

[cthulhu-rider]

neo-go/pkg/core/blockchain.go

Lines 1185 to 1186 in 5566e35

	var batchAcc util.Uint160
	copy(batchAcc[:], k[1:])

also looks like a candidate, but (un)fortunately the slice len is not checked, so the conversion cannot be used

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 86.11%. Comparing base (5566e35) to head (c975d72).
Report is 2 commits behind head on master.

Files	Patch %	Lines
pkg/core/interop/runtime/util.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3505   +/-   ##
=======================================
  Coverage   86.11%   86.11%           
=======================================
  Files         331      331           
  Lines       38564    38562    -2     
=======================================
- Hits        33209    33208    -1     
- Misses       3825     3826    +1     
+ Partials     1530     1528    -2     

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[AnnaShaleva]

Otherwise LGTM.