Implement EXTCODEHASH in LegacyVM

[gumb0]

#5118

[axic]

Is it possible to introduce it in both LegacyVM and aleth-interpreter in the same PRs? Or is aleth-interpreter ignored for the non-final-constantinople ones yet? Lastly, would finishing the tracing PR supersede this question? 😉

[gumb0]

@axic I can try to include aleth-interpreter support here, though I would prefer them to be separate PRs for more manageable PR size, easier review and to merge this earlier.

I'm not sure what it has to do with tracing, do you mean we can throw out LegacyVM when tracing is complete?

[axic]

I would prefer them to be separate PRs for more manageable PR size

I'm fine with that, just was wondering if it is only ignored or will it have its own PR.

I'm not sure what it has to do with tracing, do you mean we can throw out LegacyVM when tracing is complete?

Exactly.

[gumb0]

I plan to make another PR for aleth-inerpreter as I did for CREATE2

[codecov-io]

Codecov Report

Merging #5134 into develop will increase coverage by 0.07%.
The diff coverage is 97.33%.

@@             Coverage Diff             @@
##           develop    #5134      +/-   ##
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+ Coverage    59.63%   59.71%   +0.07%     
===========================================
  Files          337      337              
  Lines        27184    27247      +63     
  Branches      3170     3169       -1     
===========================================
+ Hits         16212    16270      +58     
- Misses        9888     9890       +2     
- Partials      1084     1087       +3