feat(artifacts): gzip manifest.json before uploading

[moredatarequired]

Description

• Fixes WB-NNNNN
• Fixes #NNNN

What does the PR do? Include a concise description of the PR contents.

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

Testing

How was this PR tested?

[moredatarequired]

• feat(artifacts): gzip manifest.json before uploading #7402 👈
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

Join @moredatarequired and the rest of your teammates on Graphite

[codecov]

Codecov Report

Attention: Patch coverage is 58.33333% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 73.00%. Comparing base (db622f3) to head (fc2726a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7402      +/-   ##
==========================================
- Coverage   75.90%   73.00%   -2.91%     
==========================================
  Files         518      518              
  Lines       54537    54538       +1     
==========================================
- Hits        41396    39815    -1581     
- Misses      12762    14342    +1580     
- Partials      379      381       +2     

Flag	Coverage Δ
func	43.25% <58.33%> (+0.01%)	⬆️
system	59.75% <58.33%> (-4.23%)	⬇️
unit	57.75% <16.66%> (-0.02%)	⬇️

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

Files	Coverage Δ
wandb/sdk/artifacts/artifact_saver.py	78.40% <58.33%> (-17.00%)	⬇️

... and 58 files with indirect coverage changes