feat(artifacts): add save() method on ArtifactCollection to allow persisting changes

[amusipatla-wandb]

Description

• Fix for WB-18464

This PR pulls the description and tags fields, and allows changes to be made and saved directly via the save function

• I updated CHANGELOG.md, or it's not applicable

Testing

Tested locally to make sure description and tags were pulled correctly, added integration tests for saving

[codecov]

Codecov Report

Attention: Patch coverage is 96.47059% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 75.84%. Comparing base (0383350) to head (11c3729).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7528      +/-   ##
==========================================
+ Coverage   74.27%   75.84%   +1.56%     
==========================================
  Files         500      500              
  Lines       55658    54121    -1537     
==========================================
- Hits        41342    41046     -296     
+ Misses      13907    12668    -1239     
+ Partials      409      407       -2     

Flag	Coverage Δ
func	40.84% <30.58%> (-0.49%)	⬇️
system	63.50% <96.47%> (+0.03%)	⬆️
unit	56.36% <30.58%> (+0.97%)	⬆️

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

Files	Coverage Δ
wandb/apis/public/artifacts.py	92.94% <96.47%> (+1.59%)	⬆️

... and 105 files with indirect coverage changes

[moredatarequired]

Looks great!

[dmitryduev]

Minor comment, otherwise LGTM!