feat: add simulate RPC (XLS-69d)

[mvadari]

High Level Overview of Change

This PR adds a new API method, titled simulate, which executes a dry run of a transaction submission.

This PR also fixes #5070.

Context of Change

XLS spec: XRPLF/XRPL-Standards#207

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)

Test Plan

Testing is still in progress. Unit tests are and will be added.

[codecov]

Codecov Report

Attention: Patch coverage is 99.19028% with 2 lines in your changes missing coverage. Please review.

Project coverage is 76.2%. Comparing base (23991c9) to head (01e5683).

Files with missing lines	Patch %	Lines
src/xrpld/rpc/detail/TransactionSign.cpp	98.4%	1 Missing ⚠️
src/xrpld/rpc/handlers/Simulate.cpp	99.2%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #5069     +/-   ##
=========================================
+ Coverage     76.1%   76.2%   +0.1%     
=========================================
  Files          760     761      +1     
  Lines        61548   61727    +179     
  Branches      8159    8129     -30     
=========================================
+ Hits         46836   47052    +216     
+ Misses       14712   14675     -37     

Files with missing lines	Coverage Δ
include/xrpl/protocol/ErrorCodes.h	100.0% <ø> (ø)
src/libxrpl/protocol/ErrorCodes.cpp	71.4% <ø> (ø)
src/libxrpl/protocol/InnerObjectFormats.cpp	100.0% <100.0%> (ø)
src/xrpld/app/ledger/detail/LedgerMaster.cpp	41.6% <100.0%> (ø)
src/xrpld/app/ledger/detail/OpenLedger.cpp	70.6% <100.0%> (ø)
src/xrpld/app/main/Main.cpp	79.1% <ø> (ø)
src/xrpld/app/misc/NetworkOPs.cpp	68.3% <100.0%> (ø)
src/xrpld/app/misc/TxQ.h	98.1% <ø> (ø)
src/xrpld/app/misc/detail/TxQ.cpp	98.9% <100.0%> (+0.1%)	⬆️
src/xrpld/app/tx/applySteps.h	100.0% <ø> (ø)
... and 17 more

... and 10 files with indirect coverage changes

[mvadari]

This is now fully finished and ready for review.