[WIP] RPC simulation with gas used estimate tagging

[jewei1997]

Describe your changes and provide context

Testing performed to validate your change

[codecov]

Codecov Report

Attention: Patch coverage is 65.82278% with 27 lines in your changes missing coverage. Please review.

Project coverage is 61.36%. Comparing base (1232335) to head (26b6cbb).

Files with missing lines	Patch %	Lines
evmrpc/send.go	65.62%	20 Missing and 2 partials ⚠️
x/evm/ante/gas.go	75.00%	1 Missing and 2 partials ⚠️
app/test_helpers.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2073      +/-   ##
==========================================
- Coverage   61.43%   61.36%   -0.08%     
==========================================
  Files         264      264              
  Lines       24695    24769      +74     
==========================================
+ Hits        15171    15199      +28     
- Misses       8395     8439      +44     
- Partials     1129     1131       +2     

Files with missing lines	Coverage Δ
app/ante.go	54.43% <100.00%> (ø)
app/test_helpers.go	59.49% <0.00%> (-0.51%)	⬇️
x/evm/ante/gas.go	68.42% <75.00%> (-4.31%)	⬇️
evmrpc/send.go	44.02% <65.62%> (+14.55%)	⬆️

... and 2 files with indirect coverage changes