Add Vector256 support to the locator

[mvadari]

High Level Overview of Change

Context of Change

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (non-breaking change that only restructures code)
• Performance (increase or change in throughput and/or latency)
• Tests (you added tests for code that already exists, or your new feature included in this PR)
• Documentation update
• Chore (no impact to binary, e.g. .gitignore, formatting, dropping support for older tooling)
• Release

API Impact

• Public API: New feature (new methods and/or new fields)
• Public API: Breaking change (in general, breaking changes should only impact the next api_version)
• libxrpl change (any change that may affect libxrpl or dependents of libxrpl)
• Peer protocol change (must be backward compatible or bump the peer protocol version)

[codecov]

Codecov Report

❌ Patch coverage is 84.21053% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.5%. Comparing base (881087d) to head (db758c5).

Files with missing lines	Patch %	Lines
src/xrpld/app/wasm/detail/HostFuncImpl.cpp	84.2%	6 Missing ⚠️

Additional details and impacted files

@@                      Coverage Diff                      @@
##           ripple/wasmi-host-functions   #6131     +/-   ##
=============================================================
- Coverage                         79.5%   79.5%   -0.0%     
=============================================================
  Files                              848     848             
  Lines                            73417   73432     +15     
  Branches                          8401    8423     +22     
=============================================================
- Hits                             58387   58366     -21     
- Misses                           15030   15066     +36     

Files with missing lines	Coverage Δ
src/xrpld/app/wasm/detail/HostFuncImpl.cpp	99.0% <84.2%> (-1.0%)	⬇️

... and 8 files with indirect coverage changes

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[pwang200]

Look good to me, but Olek should take a look.