feat(modelreg) : add the ability to log artifact while linking to registered model

[ibindlish]

Fixes WB-10604
Fixes #4090

Description

Allows an artifact to be linked to a registered model via link_artifact even if it hasn't been logged yet.

Testing

functional yea tests
modified link-artifact.py

Checklist

• https://wandb.atlassian.net/browse/WB-10604

[codecov]

Codecov Report

Merging #4233 (627d36f) into master (54d64ef) will increase coverage by 0.04%.
The diff coverage is 100.00%.

❗ Current head 627d36f differs from pull request most recent head d0e1ecb. Consider uploading reports for the commit d0e1ecb to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4233      +/-   ##
==========================================
+ Coverage   82.63%   82.68%   +0.04%     
==========================================
  Files         256      256              
  Lines       32608    32602       -6     
==========================================
+ Hits        26945    26956      +11     
+ Misses       5663     5646      -17     

Flag	Coverage Δ
functest	55.99% <100.00%> (+0.05%)	⬆️
unittest	73.44% <50.00%> (+0.06%)	⬆️

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

Impacted Files	Coverage Δ
wandb/sdk/wandb_run.py	90.89% <100.00%> (-0.24%)	⬇️
wandb/sdk/lib/git.py	79.01% <0.00%> (ø)
wandb/apis/public.py	82.57% <0.00%> (+0.26%)	⬆️
wandb/sdk/wandb_setup.py	88.94% <0.00%> (+0.50%)	⬆️
wandb/sdk/internal/internal_api.py	86.98% <0.00%> (+0.51%)	⬆️
wandb/sdk/lib/sock_client.py	94.17% <0.00%> (+1.05%)	⬆️
wandb/sdk/launch/agent/agent.py	92.25% <0.00%> (+1.40%)	⬆️
wandb/sdk/internal/meta.py	90.79% <0.00%> (+3.06%)	⬆️

[vwrj]

Nice! LGTM

[dmitryduev]

👍🏻