feat(sdk): W&B to W&B Importer

[andrewtruong]

Description

Adds back tooling to migrate select data from one W&B instance to a second W&B instance.

Users can migrate:

• Runs
• Artifact (sequences)
• Reports

Some data will not migrate exactly, e.g. dates will show up as at import-time instead of original run-time.

Testing

e2e tests for each of runs, artifacts, reports

[codecov]

Codecov Report

Attention: Patch coverage is 82.97534% with 214 lines in your changes are missing coverage. Please review.

Project coverage is 77.10%. Comparing base (754b06f) to head (9b96251).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6897      +/-   ##
==========================================
- Coverage   78.97%   77.10%   -1.88%     
==========================================
  Files         492      495       +3     
  Lines       52508    53373     +865     
==========================================
- Hits        41470    41151     -319     
- Misses      10721    11897    +1176     
- Partials      317      325       +8     

Flag	Coverage Δ
func	45.06% <0.32%> (-4.96%)	⬇️
system	65.55% <81.70%> (+1.38%)	⬆️
unit	58.29% <17.74%> (-0.54%)	⬇️

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

Files	Coverage Δ
wandb/apis/importers/__init__.py	100.00% <100.00%> (+100.00%)	⬆️
wandb/apis/public/files.py	92.95% <100.00%> (+6.39%)	⬆️
wandb/apis/importers/internals/protocols.py	97.56% <97.56%> (ø)
wandb/util.py	86.19% <66.66%> (+1.21%)	⬆️
wandb/apis/importers/internals/util.py	91.66% <91.66%> (ø)
wandb/apis/importers/validation.py	84.50% <84.50%> (ø)
wandb/apis/importers/internals/internal.py	90.71% <90.71%> (ø)
wandb/apis/importers/wandb.py	79.43% <79.43%> (ø)

... and 98 files with indirect coverage changes

Changes implemented.