EIP-1559: Be resilient to target gas used 0 and cap gas used to gas limit

[jewei1997]

Describe your changes and provide context

2 minor fixes:

• be resilient to target gas used = 0. Right now, if target gas used is 0, it would crash.
• cap block gas used to block gas limit in case for whatever reason block gas used is larger than block gas limit

Testing performed to validate your change

unit tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.55%. Comparing base (a45b5ca) to head (773c69d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1885      +/-   ##
==========================================
+ Coverage   61.47%   61.55%   +0.08%     
==========================================
  Files         263      263              
  Lines       23312    23306       -6     
==========================================
+ Hits        14332    14347      +15     
+ Misses       7970     7951      -19     
+ Partials     1010     1008       -2     

Files with missing lines	Coverage Δ
x/evm/keeper/fee.go	87.50% <100.00%> (+1.78%)	⬆️
x/evm/types/params.go	74.28% <100.00%> (+4.79%)	⬆️

... and 2 files with indirect coverage changes