extractAsBytesFromArray method for JSON precompile

[dssei]

Describe your changes and provide context

extractAsBytesFromArray method for JSON precompile to allow elements extraction from JSON arrays.

This additional method is needed for cases like

{
  "data": {
    "exchange_rates": [
      [
        1727762390,
        "1.033207463698531844"
      ],
      [
        1727545459,
        "1.032887092691178063"
      ]
    ],
    "apr": "0.000101145698240442"
  }
}

We do have methods allowing extracting data by key or array(list) by key, but no way to extract element from array.
E.g. data.exchange_rates[0][0]

Testing performed to validate your change

• unit test

[codecov]

Codecov Report

Attention: Patch coverage is 81.81818% with 6 lines in your changes missing coverage. Please review.

Project coverage is 61.30%. Comparing base (d50f236) to head (b7e6152).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
precompiles/json/json.go	81.81%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2054      +/-   ##
==========================================
- Coverage   61.50%   61.30%   -0.20%     
==========================================
  Files         264      264              
  Lines       24593    24626      +33     
==========================================
- Hits        15125    15098      -27     
- Misses       8335     8395      +60     
  Partials     1133     1133              

Files with missing lines	Coverage Δ
precompiles/json/json.go	57.77% <81.81%> (+7.77%)	⬆️

... and 2 files with indirect coverage changes

[jewei1997]

I think you might need migration handlers to properly roll this out

[dssei]

I think you might need migration handlers to properly roll this out

I see. Thought migration handlers are for modules related changes. Looked into similar PRs but have not seen any examples of handlers changes. Do you have one by any chance?

[jewei1997]

yeah I think you can look at this PR as an example. Basically you need migration handlers to update the precompile contracts #2043