depr: deprecate utils.downloads in favor of Dataset.download()

[dkrako]

⚠️ Deprecation

utils.downloads is deprecated. please use Dataset.downloads() instead.
utils.downloads will be removed in pymovements v0.26.0

Description

Deprecate utils.downloads in favor of Dataset.downloads()

The following warnings are printed:

DeprecationWarning: Call to deprecated function (or staticmethod) download_and_extract_archive. (Please use Dataset.downloads() instead. This module will be removed in v0.26.0.) -- Deprecated since version v0.21.0.

DeprecationWarning: Call to deprecated function (or staticmethod) download_file. (Please use Dataset.downloads() instead. This module will be removed in v0.26.0.) -- Deprecated since version v0.21.0.

partly resolves #999

blocked by #1028

Implemented changes

• moved utils/downloads.py to dataset/_utils/downloads.py and adjusted to new location
• use dataset._utils.downloads in dataset.dataset_download
• created deprecated function in utils/downloads.py
• moved tests/unit/utils/downloads_test.py to tests/unit/dataset/_utils/_downloads_test.py
• add test that functions are correctly deprecated
• add test that functions are removed in planned version

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (592ff7b) to head (022a86e).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #1030   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           78        82    +4     
  Lines         3561      3618   +57     
  Branches       629       645   +16     
=========================================
+ Hits          3561      3618   +57     

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