Bugfixes/align availables workspaces and set workspace operation

[frascuchon]

Description

This PR adapts the client workflow to check available workspaces before the rg.set_workspace function. Since the set_workspace is based on list_workspaces method, a code refactor has been applied to return only available workspaces for the connected user.

@alvarobartt we need to align the User.workspaces, list_workspace, and Workspace.create

Closes #3262

Type of change

(Please delete options that are not relevant. Remember to title the PR according to the type of change)

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

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: 100.00% and project coverage change: +0.30 🎉

Comparison is base (d143492) 90.73% compared to head (027e24a) 91.04%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3263      +/-   ##
==========================================
+ Coverage   90.73%   91.04%   +0.30%     
==========================================
  Files         219      219              
  Lines       11673    11681       +8     
==========================================
+ Hits        10592    10635      +43     
+ Misses       1081     1046      -35     

Flag	Coverage Δ
pytest	91.04% <100.00%> (+0.30%)	⬆️

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

Impacted Files	Coverage Δ
src/argilla/client/client.py	94.42% <100.00%> (+0.16%)	⬆️
src/argilla/client/sdk/users/api.py	96.96% <100.00%> (+0.09%)	⬆️

... and 5 files with indirect coverage changes

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[alvarobartt]

LGTM, but in User there are some inconsistencies as we're not always the current User but e.g. the owner listing all the users, so workspaces listing would fail, and I wouldn't update the SDK until the mock is fixed in a separate PR. But I agree with the missing type-hints, extended unit tests, and Argilla.__init__ fixes