Add a hard max gas wanted as consensus param

[jewei1997]

Describe your changes and provide context

Testing performed to validate your change

[codecov]

Codecov Report

Attention: Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 54.57%. Comparing base (8a2b961) to head (96cccd6).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
baseapp/params.go	0.00%	2 Missing and 1 partial ⚠️
server/export.go	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #572      +/-   ##
==========================================
- Coverage   54.57%   54.57%   -0.01%     
==========================================
  Files         632      632              
  Lines       55267    55272       +5     
==========================================
+ Hits        30164    30166       +2     
- Misses      22946    22948       +2     
- Partials     2157     2158       +1     

Files with missing lines	Coverage Δ
server/export.go	42.85% <50.00%> (+0.10%)	⬆️
baseapp/params.go	37.89% <0.00%> (-1.24%)	⬇️

... and 1 file with indirect coverage changes

🚀 New features to boost your workflow:

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