fix(ibc-app-nft-transfer): compile without default features

[rnbguy]

Closes: #XXX

Description

ibc-app-nft-transfer needs base64 with alloc feature.

check-features was disabled before in favor of status check during merge group checks. But it has some nuances. Refer to #1174's description.

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PR author checklist:

• Added changelog entry, using unclog.
• Added tests.
• Linked to GitHub issue.
• Updated code comments and documentation (e.g., docs/).
• Tagged one reviewer who will be the one responsible for shepherding this PR.

Reviewer checklist:

• Reviewed Files changed in the GitHub PR explorer.
• Manually tested (in case integration/unit/mock tests are absent).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.33%. Comparing base (d72fb58) to head (43b8113).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1195   +/-   ##
=======================================
  Coverage   64.33%   64.33%           
=======================================
  Files         229      229           
  Lines       22083    22083           
=======================================
  Hits        14208    14208           
  Misses       7875     7875           

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