fix(artifacts): fix long artifact paths on Windows

[ArtsiomWB]

Description

No JIRA ticket yet

• Fixes WB-NNNNN

• Fixes #NNNN

• fixes Volkswagen's blocker regarding artifact.download()

What does the PR do?

The PR normalizes the Path we receive once an artifact is downloaded. By adding:
path = str(Path(self.path)) to the path generating process, we translate the relative path of entry into a system path before it is added to the root path.

Testing

How was this PR tested?

Tested using Artifact tests that are built into wandb/wandb

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (cb62d98) 79.65% compared to head (9c0f3fd) 79.71%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6846      +/-   ##
==========================================
+ Coverage   79.65%   79.71%   +0.05%     
==========================================
  Files         452      452              
  Lines       50747    50748       +1     
==========================================
+ Hits        40423    40453      +30     
+ Misses      10029    10000      -29     
  Partials      295      295              

Flag	Coverage Δ
func	50.23% <100.00%> (-0.01%)	⬇️
system	64.39% <100.00%> (+<0.01%)	⬆️
unit	58.99% <100.00%> (+0.06%)	⬆️

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

Files	Coverage Δ
wandb/sdk/artifacts/artifact_manifest_entry.py	94.11% <100.00%> (+0.07%)	⬆️

... and 15 files with indirect coverage changes

[estellazx]

should be good, I tested to make sure nothing broke but didn't reproduce the customers usecase