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 12.50000% with 63 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.8%. Comparing base (977caea) to head (3260541).

Files with missing lines	Patch %	Lines
src/xrpld/app/wasm/host_functions.macro	0.0%	62 Missing ⚠️
...xrpld/app/wasm/detail/HostFuncImplLedgerHeader.cpp	85.7%	1 Missing ⚠️

Additional details and impacted files

@@                      Coverage Diff                      @@
##           ripple/wasmi-host-functions   #6218     +/-   ##
=============================================================
- Coverage                         79.9%   79.8%   -0.1%     
=============================================================
  Files                              854     855      +1     
  Lines                            73782   73841     +59     
  Branches                          8301    8360     +59     
=============================================================
+ Hits                             58918   58922      +4     
- Misses                           14864   14919     +55     

Files with missing lines	Coverage Δ
src/xrpld/app/wasm/HostFunc.h	100.0% <ø> (ø)
src/xrpld/app/wasm/HostFuncImpl.h	84.6% <ø> (ø)
src/xrpld/app/wasm/detail/HostFuncImplFloat.cpp	99.1% <100.0%> (ø)
src/xrpld/app/wasm/detail/HostFuncWrapper.cpp	93.8% <100.0%> (-<0.1%)	⬇️
...xrpld/app/wasm/detail/HostFuncImplLedgerHeader.cpp	96.2% <85.7%> (-3.8%)	⬇️
src/xrpld/app/wasm/host_functions.macro	0.0% <0.0%> (ø)

... and 1 file with indirect coverage changes

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