chore(sdk): adding back the required flag for wandb-core

[kptkin]

Description

• Fixes WB-17798

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?

added several unit tests and tested manually

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 75.14%. Comparing base (1633dc0) to head (3611135).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7228      +/-   ##
==========================================
- Coverage   76.06%   75.14%   -0.92%     
==========================================
  Files         512      512              
  Lines       54343    54362      +19     
==========================================
- Hits        41337    40853     -484     
- Misses      12639    13145     +506     
+ Partials      367      364       -3     

Flag	Coverage Δ
func	42.93% <83.33%> (-0.14%)	⬇️
system	63.22% <83.33%> (-1.17%)	⬇️
unit	57.67% <77.77%> (+0.06%)	⬆️

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

Files	Coverage Δ
wandb/__init__.py	95.68% <100.00%> (ø)
wandb/env.py	78.41% <100.00%> (+0.23%)	⬆️
wandb/errors/__init__.py	94.11% <100.00%> (+0.36%)	⬆️
wandb/sdk/artifacts/artifact.py	93.24% <100.00%> (+0.03%)	⬆️
wandb/sdk/wandb_settings.py	93.96% <ø> (ø)
wandb/util.py	84.63% <100.00%> (-1.06%)	⬇️
wandb/sdk/wandb_require.py	95.45% <75.00%> (-2.05%)	⬇️
wandb/sdk/service/service.py	80.62% <71.42%> (-1.13%)	⬇️

... and 27 files with indirect coverage changes

[ibindlish]

lgtm