Update functionality to download demos

[fealho]

CU-86b6fugf3, Resolve #2661
CU-86b6fugf3, Resolve #2663
CU-86b6xkdcf, Resolve #2686
CU-86b6xjuk7, Resolve #2685
CU-86b6xjugh, Resolve #2684
CU-86b6xrcb1, Resolve #2689
CU-86b6xrqf0, Resolve #2691
CU-86b6xnx26, Resolve #2687
CU-86b6xp7a0, Resolve #2688
CU-86b6xrcah, Resolve #2690

[sdv-team]

Task linked: CU-86b6fugf3 SDV - Add get_source and get_readme functions for demo datasets #2663
Task linked: CU-86b6xjugh SDV - If a source or readme does not exist for a dataset, show a warning #2684
Task linked: CU-86b6xjuk7 SDV - Ensure that the source/readme files can only be downloaded in txt format #2685
Task linked: CU-86b6xkdcf SDV - Prevent users from accidentally overriding the source or README files #2686
Task linked: CU-86b6xnx26 SDV - download_demo failing when output_folder_path is set #2687
Task linked: CU-86b6xp7a0 SDV - download_demo may fail for some data.zip files #2688
Task linked: CU-86b6xrcah SDV - download_demo should ignore non-csv files in data.zip #2690
Task linked: CU-86b6xrcb1 SDV - Improve error message when no csv file are found for a dataset when using download_demo #2689
Task linked: CU-86b6xrqf0 SDV - download_demo errors if the dataset_name in the metainfo does not match the dataset name in the folder #2691

[codecov]

Codecov Report

❌ Patch coverage is 96.31336% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 98.12%. Comparing base (926c0b4) to head (da3c9e2).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
sdv/datasets/demo.py	96.27%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2705      +/-   ##
==========================================
- Coverage   98.16%   98.12%   -0.04%     
==========================================
  Files          72       72              
  Lines        7830     7993     +163     
==========================================
+ Hits         7686     7843     +157     
- Misses        144      150       +6     

Flag	Coverage Δ
integration	75.60% <58.98%> (-0.72%)	⬇️
unit	96.84% <92.62%> (-0.12%)	⬇️

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[amontanez24]

I removed the test datasets you created from the buckets. I think that caused some test failures. Can we use datasets that are actually in the bucket?

[amontanez24]

Please rebase and merge when you merge