refactor(group): CLI tests using Tendermint Mock

[likhita-809]

Description

Closes: #13035

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Author Checklist

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I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

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your handle next to the items reviewed if you only reviewed selected items.

I have...

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

[codecov]

Codecov Report

Merging #13067 (0c704e5) into main (4fe7797) will decrease coverage by 2.01%.
The diff coverage is 47.01%.

❗ Current head 0c704e5 differs from pull request most recent head 9e441e7. Consider uploading reports for the commit 9e441e7 to get more accurate results

@@            Coverage Diff             @@
##             main   #13067      +/-   ##
==========================================
- Coverage   55.87%   53.86%   -2.02%     
==========================================
  Files         646      650       +4     
  Lines       54895    55343     +448     
==========================================
- Hits        30675    29811     -864     
- Misses      21762    23149    +1387     
+ Partials     2458     2383      -75     

Impacted Files	Coverage Δ
baseapp/abci.go	67.01% <0.00%> (+2.59%)	⬆️
baseapp/baseapp.go	77.93% <ø> (+1.06%)	⬆️
baseapp/options.go	69.23% <ø> (+0.71%)	⬆️
client/context.go	55.37% <0.00%> (-0.91%)	⬇️
client/flags/flags.go	19.35% <0.00%> (-0.32%)	⬇️
client/rpc/status.go	66.66% <ø> (ø)
client/utils.go	34.92% <0.00%> (ø)
crypto/keys/secp256k1/secp256k1.go	88.63% <ø> (ø)
server/config/config.go	38.00% <0.00%> (-1.59%)	⬇️
server/mock/store.go	19.00% <0.00%> (-0.39%)	⬇️
... and 140 more

[JeancarloBarrios]

LGTM

[alexanderbez]

LGTM. One minor nit :)