refactor bank/oracle precompile to use dynamic gas

[codchen]

Describe your changes and provide context

For functions that involve iterators, we need to use dynamic gas. At the moment, bank and oracle are the two precompiles affected.

Testing performed to validate your change

unit test

[codecov]

Codecov Report

Attention: Patch coverage is 62.50000% with 33 lines in your changes missing coverage. Please review.

Project coverage is 61.45%. Comparing base (de63e75) to head (fbe7a79).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
precompiles/bank/bank.go	58.82%	28 Missing ⚠️
precompiles/oracle/oracle.go	68.75%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1926      +/-   ##
==========================================
+ Coverage   61.38%   61.45%   +0.06%     
==========================================
  Files         263      263              
  Lines       23356    23373      +17     
==========================================
+ Hits        14337    14363      +26     
+ Misses       8015     8010       -5     
+ Partials     1004     1000       -4     

Files with missing lines	Coverage Δ
app/app.go	66.14% <100.00%> (ø)
precompiles/common/precompiles.go	51.82% <100.00%> (ø)
x/evm/keeper/evm.go	69.48% <100.00%> (+1.29%)	⬆️
precompiles/oracle/oracle.go	66.66% <68.75%> (+2.38%)	⬆️
precompiles/bank/bank.go	60.72% <58.82%> (+4.31%)	⬆️

... and 1 file with indirect coverage changes

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