add DatasetListRecord and DatasetListVersion dataclasses to only extract required fields when listing datasets

[mattseddon]

Related to https://github.com/iterative/studio/issues/10849 and replaces #628 (see replaced PR for some details)

This PR adds DatasetListRecord and DatasetListVersion dataclasses and uses those classes within Catalog's ls_datasets and list_datasets_versions methods. Using these new classes means that we can significantly cut down the data being processed when listing datasets. This should give us a performance boost in both the CLI and SaaS and hopefully prevent the slow query alerts in the related issue.

Note: There is some duplication added in this PR, it does not seem practical to extend the original dataclasses in this instance.

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[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 9 lines in your changes missing coverage. Please review.

Project coverage is 87.70%. Comparing base (f759eff) to head (1133dab).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/datachain/dataset.py	87.75%	3 Missing and 3 partials ⚠️
src/datachain/data_storage/metastore.py	90.00%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #634      +/-   ##
==========================================
- Coverage   87.74%   87.70%   -0.04%     
==========================================
  Files         112      112              
  Lines       10605    10672      +67     
  Branches     1431     1437       +6     
==========================================
+ Hits         9305     9360      +55     
- Misses        946      954       +8     
- Partials      354      358       +4     

Flag	Coverage Δ
datachain	87.64% <88.88%> (-0.04%)	⬇️

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[dreadatour]

Looks good to me 👍