chore(sdk): use pytest tmp_path so we can inspect failures

[raubitsj]

Description

Once this pytest feature gets out, then we can use temp dir retention policies based on failures etc:
pytest-dev/pytest#10442

Testing

Manual test to make sure directory exists after pytest exit
By default pytest keeps around 3 sessions.

Checklist

• Include reference to internal ticket "Fixes WB-NNNN" and/or GitHub issue "Fixes #NNNN" (if applicable)
• Ensure PR title compliance with the conventional commits standards

[codecov]

Codecov Report

Merging #4664 (0fa824d) into main (709a60d) will increase coverage by 0.00%.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4664   +/-   ##
=======================================
  Coverage   83.22%   83.22%           
=======================================
  Files         279      279           
  Lines       34917    34917           
=======================================
+ Hits        29060    29061    +1     
+ Misses       5857     5856    -1     

Flag	Coverage Δ
functest	56.08% <ø> (+0.03%)	⬆️
unittest	73.81% <ø> (+0.02%)	⬆️

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

Impacted Files	Coverage Δ
wandb/sdk/internal/file_stream.py	88.85% <0.00%> (-1.02%)	⬇️
wandb/util.py	87.44% <0.00%> (-0.41%)	⬇️
wandb/sdk/lib/git.py	77.71% <0.00%> (ø)
wandb/sdk/wandb_setup.py	88.94% <0.00%> (+0.50%)	⬆️
wandb/sdk/lib/sock_client.py	94.17% <0.00%> (+1.05%)	⬆️
wandb/sdk/internal/system/system_info.py	91.55% <0.00%> (+3.24%)	⬆️

[dmitryduev]

Great idea, thanks!