Refactor: replace fee().accountReserve(0) with fee().reserve

[tequdev]

High Level Overview of Change

Fixed fee().accountReserve(0) to use fee().reserve for getting the current network reserve amount that not for acquiring account’s reserve.

Type of Change

• Refactor (non-breaking change that only restructures code)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.5%. Comparing base (3d44758) to head (aaeae45).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #5843     +/-   ##
=========================================
- Coverage     79.5%   79.5%   -0.0%     
=========================================
  Files          816     816             
  Lines        72183   72179      -4     
  Branches      8273    8271      -2     
=========================================
- Hits         57369   57364      -5     
- Misses       14814   14815      +1     

Files with missing lines	Coverage Δ
src/xrpld/app/misc/FeeVoteImpl.cpp	95.9% <100.0%> (ø)
src/xrpld/app/misc/NetworkOPs.cpp	71.5% <100.0%> (-0.1%)	⬇️
src/xrpld/app/misc/detail/TxQ.cpp	97.7% <100.0%> (ø)
src/xrpld/app/paths/PathRequest.cpp	73.3% <100.0%> (-0.1%)	⬇️
src/xrpld/app/paths/Pathfinder.cpp	89.2% <100.0%> (ø)
src/xrpld/app/tx/detail/Payment.cpp	93.8% <100.0%> (ø)
src/xrpld/app/tx/detail/XChainBridge.cpp	91.7% <100.0%> (ø)

... and 3 files with indirect coverage changes

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[mvadari]

Blocked for now on the 3.0 release, will be merged after that

[mvadari]

@tequdev is this PR ready to merge?

[tequdev]

@tequdev is this PR ready to merge?

yes👍