clean up host function header files with macros

[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 90.90909% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 80.5%. Comparing base (1b4a564) to head (8716854).

Files with missing lines	Patch %	Lines
...xrpld/app/wasm/detail/HostFuncImplLedgerHeader.cpp	85.7%	1 Missing ⚠️

Additional details and impacted files

@@                     Coverage Diff                     @@
##           ripple/wasmi-host-functions   #6218   +/-   ##
===========================================================
  Coverage                         80.5%   80.5%           
===========================================================
  Files                              861     861           
  Lines                            67751   67749    -2     
  Branches                          7285    7282    -3     
===========================================================
+ Hits                             54544   54547    +3     
+ Misses                           13207   13202    -5     

Files with missing lines	Coverage Δ
src/xrpld/app/wasm/HostFunc.h	100.0% <ø> (ø)
src/xrpld/app/wasm/HostFuncImpl.h	83.3% <ø> (ø)
src/xrpld/app/wasm/detail/HostFuncImplFloat.cpp	98.2% <100.0%> (ø)
src/xrpld/app/wasm/detail/HostFuncWrapper.cpp	98.1% <100.0%> (-<0.1%)	⬇️
...xrpld/app/wasm/detail/HostFuncImplLedgerHeader.cpp	94.4% <85.7%> (-5.6%)	⬇️

... and 2 files with indirect coverage changes

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