fix: ignore error when key not found in keys delete

[170210]

Description

If you provide a list of keys to the keys delete command, it will stop and fail if one of those keys is not found.

This pr cherry-pick the following pr:

• fix(client/keys): don't return when key not found in keys delete  cosmos/cosmos-sdk#18562

Motivation and context

How has this been tested?

Screenshots (if appropriate):

Checklist:

• I followed the contributing guidelines and code of conduct.
• I have added a relevant changelog to CHANGELOG.md
• I have added tests to cover my changes.
• I have updated the documentation accordingly.
• I have updated API documentation client/docs/swagger-ui/swagger.yaml

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1 out of 2 committers have signed the CLA.

✅ 170210
❌ JulianToledano
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.41%. Comparing base (05ff4ea) to head (495b1f8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1312      +/-   ##
==========================================
- Coverage   70.41%   70.41%   -0.01%     
==========================================
  Files         643      643              
  Lines       54758    54759       +1     
==========================================
  Hits        38560    38560              
- Misses      14023    14024       +1     
  Partials     2175     2175              

Files	Coverage Δ
client/keys/delete.go	74.28% <100.00%> (+0.75%)	⬆️

... and 1 file with indirect coverage changes