refactor: Fill txJson based on apiVersion

[rrmanukyan]

High Level Overview of Change

Adjusts fillJsonQueue to populate txJson consistently with how
fillJsonTx represents transactions for the requested API version.

Type of Change

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

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)
• Public API: Non-breaking change (additional fields or fixes)
• Public API: Test-only change (no impact to or change in behavior
  of existing APIs)

[codecov]

Codecov Report

❌ Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.1%. Comparing base (aa55392) to head (66ea84b).

Files with missing lines	Patch %	Lines
src/xrpld/app/ledger/detail/LedgerToJson.cpp	71.4%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #7109     +/-   ##
=========================================
- Coverage     82.1%   82.1%   -0.0%     
=========================================
  Files         1010    1010             
  Lines        76064   76068      +4     
  Branches      7375    7375             
=========================================
+ Hits         62470   62473      +3     
- Misses       13594   13595      +1     

Files with missing lines	Coverage Δ
src/xrpld/app/ledger/detail/LedgerToJson.cpp	75.8% <71.4%> (-<0.1%)	⬇️

... and 2 files with indirect coverage changes

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[pratikmankawde]

LGTM

[bthomee]

@rrmanukyan is this ready to merge?

[rrmanukyan]

@bthomee yes it is