chore(artifacts): add artifact Sequence fallback for older servers

[tssweeney]

Implemented fallback for older servers w.r.t. changes introduced here: https://github.com/wandb/wandb/pull/4531/files

[codecov]

Codecov Report

Merging #4565 (2f3b2b9) into main (bb45a53) will increase coverage by 0.04%.
The diff coverage is 91.66%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4565      +/-   ##
==========================================
+ Coverage   83.01%   83.06%   +0.04%     
==========================================
  Files         261      261              
  Lines       33262    33271       +9     
==========================================
+ Hits        27614    27637      +23     
+ Misses       5648     5634      -14     

Flag	Coverage Δ
functest	56.70% <33.33%> (+0.03%)	⬆️
unittest	73.26% <91.66%> (+0.03%)	⬆️

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

Impacted Files	Coverage Δ
wandb/apis/public.py	82.16% <91.66%> (+0.02%)	⬆️
wandb/sdk/lib/git.py	79.01% <0.00%> (-0.62%)	⬇️
wandb/sdk/wandb_run.py	91.25% <0.00%> (+0.35%)	⬆️
wandb/sdk/lib/sock_client.py	94.70% <0.00%> (+1.58%)	⬆️
wandb/integration/tensorboard/monkeypatch.py	93.82% <0.00%> (+2.46%)	⬆️
wandb/sdk/internal/system/system_info.py	91.55% <0.00%> (+3.24%)	⬆️

[dmitryduev]

Thank you @tssweeney!