EIP-1559: Add max base fee as a param

[jewei1997]

Describe your changes and provide context

Introduce max base fee (as opposed to max base fee) as param that can adjusted with a gov proposal. Will set to 1,000gwei for now.

Testing performed to validate your change

added unit tests.

[codecov]

Codecov Report

Attention: Patch coverage is 37.03704% with 17 lines in your changes missing coverage. Please review.

Project coverage is 61.67%. Comparing base (bf789f3) to head (6762fb0).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
x/evm/types/params.go	30.76%	6 Missing and 3 partials ⚠️
x/evm/migrations/migrate_eip_1559_max_base_fee.go	0.00%	5 Missing ⚠️
x/evm/module.go	0.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1951      +/-   ##
==========================================
- Coverage   61.78%   61.67%   -0.11%     
==========================================
  Files         263      264       +1     
  Lines       23447    23473      +26     
==========================================
- Hits        14486    14477       -9     
- Misses       7956     7988      +32     
- Partials     1005     1008       +3     

Files with missing lines	Coverage Δ
app/eth_replay.go	0.00% <ø> (ø)
x/evm/keeper/fee.go	88.33% <100.00%> (+0.83%)	⬆️
x/evm/keeper/params.go	82.92% <100.00%> (+0.87%)	⬆️
x/evm/module.go	40.00% <0.00%> (-0.61%)	⬇️
x/evm/migrations/migrate_eip_1559_max_base_fee.go	0.00% <0.00%> (ø)
x/evm/types/params.go	69.49% <30.76%> (-4.80%)	⬇️

... and 3 files with indirect coverage changes

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