refactor: Clean up comments post-clang-tidy changes

[mvadari]

High Level Overview of Change

This PR mostly fixes old variable names in comments, but also renames some variables to be more descriptive.

No functionality changes, mostly just comment changes but all source code changes are pure refactors.

Context of Change

General cleanup, pulled out of #6620

API Impact

N/A

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.1%. Comparing base (6809690) to head (9d370c9).

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #7283   +/-   ##
=======================================
  Coverage     82.1%   82.1%           
=======================================
  Files         1010    1010           
  Lines        76151   76151           
  Branches      7415    7414    -1     
=======================================
  Hits         62489   62489           
  Misses       13662   13662           

Files with missing lines	Coverage Δ
include/xrpl/protocol/detail/ledger_entries.macro	100.0% <ø> (ø)
src/libxrpl/ledger/helpers/RippleStateHelpers.cpp	92.5% <ø> (ø)
src/libxrpl/ledger/helpers/TokenHelpers.cpp	95.4% <ø> (ø)
src/libxrpl/tx/Transactor.cpp	90.4% <ø> (ø)
...rc/libxrpl/tx/transactors/delegate/DelegateSet.cpp	100.0% <ø> (ø)
src/libxrpl/tx/transactors/dex/AMMVote.cpp	98.3% <100.0%> (ø)
src/libxrpl/tx/transactors/lending/LoanPay.cpp	94.6% <ø> (ø)
src/xrpld/app/misc/NetworkOPs.cpp	69.8% <ø> (ø)
src/xrpld/app/misc/detail/TxQ.cpp	97.1% <ø> (ø)

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.