refactor: replace unnecessary keeper dependencies from tests

[cloudgray]

Description

Closes: #833

Done

• replace Erc20Keeper dependency from other module tests
• replace FeeMarketKeeper dependency from other module tests

Limitation

• In case of ibc, bank tests, erc20 keeper is closely dependent. So, currently, it is hard to remove dependencies.
• In case of some of x/vm module tests, feemarket keeper is closely dependent. So, currently, it is hard to remove dependencies.

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Author Checklist

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I have...

• tackled an existing issue or discussed with a team member
• left instructions on how to review the changes
• targeted the main branch

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.22%. Comparing base (381a354) to head (a897992).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #838      +/-   ##
==========================================
+ Coverage   65.19%   65.22%   +0.03%     
==========================================
  Files         317      317              
  Lines       21612    21612              
==========================================
+ Hits        14090    14097       +7     
+ Misses       6358     6352       -6     
+ Partials     1164     1163       -1     

see 1 file with indirect coverage changes

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