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[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

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

Additional details and impacted files

```diff @@ 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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