feat: add list_user_workspaces and User.workspaces property

[alvarobartt]

Description

This PR adds the list_user_workspaces function in the SDK and the Python client, as of the recently included API endpoint at #3308, so this PR needs to wait upon its parent one to be merged first.

This PR then, solves the issue we had when listing workspaces from an user, since we were listing all the workspaces, and just available for certain users.

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested

• Add unit tests for both the SDK and the Python client

Checklist

• 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 filled out the contributor form (see text above)
• I have added relevant notes to the CHANGELOG.md file (See https://keepachangelog.com/)

[codecov]

Codecov Report

Patch coverage: 93.71% and project coverage change: +0.25 🎉

Comparison is base (6630d7b) 90.13% compared to head (75156ae) 90.39%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3334      +/-   ##
===========================================
+ Coverage    90.13%   90.39%   +0.25%     
===========================================
  Files          233      238       +5     
  Lines        12493    12739     +246     
===========================================
+ Hits         11261    11515     +254     
+ Misses        1232     1224       -8     

Flag	Coverage Δ
pytest	?

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

Impacted Files	Coverage Δ
...ack/integrations/huggingface/card/_dataset_card.py	100.00% <ø> (ø)
.../feedback/integrations/huggingface/card/_parser.py	100.00% <ø> (ø)
src/argilla/tasks/database/migrate.py	39.13% <ø> (-4.87%)	⬇️
src/argilla/server/settings.py	77.65% <50.00%> (-3.52%)	⬇️
src/argilla/server/database.py	76.47% <60.00%> (-23.53%)	⬇️
...lient/feedback/integrations/huggingface/dataset.py	85.36% <85.36%> (ø)
src/argilla/server/contexts/datasets.py	92.46% <89.84%> (-3.56%)	⬇️
src/argilla/server/apis/v0/handlers/workspaces.py	89.39% <90.90%> (+1.06%)	⬆️
src/argilla/client/feedback/config.py	92.59% <91.66%> (-7.41%)	⬇️
src/argilla/client/sdk/v1/users/api.py	92.30% <92.30%> (ø)
... and 43 more

... and 9 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.