fix: unhandled ImportError on huggingface_hub

[alvarobartt]

Description

As reported by @dvsrepo, when installing argilla without any extra dependency, an unhandled ImportError is raised. That's due to the import of ArgillaDatasetCard being on top of the file instead of under the @requires_version decorator, so that the ImportError will still be raised, but at least it will be handled.

Also the ImportError was being triggered just when importing the FeedbackDataset class as it was on top of the file, which was obviously wrong, as it should just raise when calling push_to_huggingface.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested

(Please describe the tests that you ran to verify your changes. And ideally, reference tests)

• Re-run unit tests locally on Python 3.11
• Make sure that from argilla.client.feedback.dataset import FeedbackDataset doesn't raise an ImportError when huggingface_hub is not installed

Checklist

• I have merged the original branch into my forked branch
• I added relevant documentation
• follows the style guidelines of this project
• I did a self-review of my code
• I made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have added relevant notes to the CHANGELOG.md file (See https://keepachangelog.com/)

[davidberenstein1957]

_ can review this tomorrow_

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.26 🎉

Comparison is base (292d2e3) 90.64% compared to head (d0cd7d9) 90.91%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3174      +/-   ##
===========================================
+ Coverage    90.64%   90.91%   +0.26%     
===========================================
  Files          215      215              
  Lines        11312    11315       +3     
===========================================
+ Hits         10254    10287      +33     
+ Misses        1058     1028      -30     

Flag	Coverage Δ
pytest	90.91% <100.00%> (+0.26%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/argilla/client/feedback/dataset.py	82.96% <100.00%> (ø)
src/argilla/server/apis/v1/handlers/datasets.py	100.00% <100.00%> (ø)
src/argilla/server/schemas/v1/datasets.py	100.00% <100.00%> (ø)
src/argilla/server/search_engine.py	92.24% <100.00%> (+0.12%)	⬆️

... and 3 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.