refactor(mint): CLI tests using Tendermint Mock

[likhita-809]

Description

Closes: #12760
ref: #12696

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Author Checklist

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I have...

• included the correct type prefix in the PR title
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• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
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Reviewers Checklist

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• confirmed the correct type prefix in the PR title
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• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
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• reviewed tests and test coverage
• manually tested (if applicable)

[codecov]

Codecov Report

Merging #13059 (2062f28) into main (0eacc88) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main   #13059   +/-   ##
=======================================
  Coverage   53.15%   53.16%           
=======================================
  Files         641      642    +1     
  Lines       54880    54959   +79     
=======================================
+ Hits        29172    29218   +46     
- Misses      23385    23412   +27     
- Partials     2323     2329    +6     

Impacted Files	Coverage Δ
x/mint/client/cli/query.go	56.96% <0.00%> (ø)
crypto/keys/internal/ecdsa/privkey.go	83.01% <0.00%> (+1.88%)	⬆️

[likhita-809]

There were no tests in x/mint/client/cli because all the tests require keeper query code.

[tac0turtle]

There were no tests in x/mint/client/cli because all the tests require keeper query code.

so part of these tests should be testing the command line interface as well. not only the logic. Like you pass x command with y flags and get the expected results.