Launch gitversion error message

[gtarpenning]

Partially Addresses WB-9990

Description

Updates error messages to provide more explicit handling when cloning from a git repo fails. This is usually due to an incorrect branch, either through a typo in the git-version parameter or because the there is no master branch.

As GitHub has changed their default branch to main, this error will likely increasingly occur, thus better handling and error messages seem appropriate. Eventually we might want to change the default branch from master -> main.

Testing

Multiple variations of branch configs on a remote git repo.

[codecov]

Codecov Report

Merging #4028 (350851e) into master (2cb6495) will increase coverage by 2.61%.
The diff coverage is 15.38%.

❗ Current head 350851e differs from pull request most recent head 484365c. Consider uploading reports for the commit 484365c to get more accurate results

@@            Coverage Diff             @@
##           master    #4028      +/-   ##
==========================================
+ Coverage   80.07%   82.69%   +2.61%     
==========================================
  Files         255      255              
  Lines       32266    32273       +7     
==========================================
+ Hits        25837    26688     +851     
+ Misses       6429     5585     -844     

Flag	Coverage Δ
functest	54.92% <0.00%> (+5.01%)	⬆️
unittest	73.42% <15.38%> (-0.04%)	⬇️

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

Impacted Files	Coverage Δ
wandb/sdk/launch/utils.py	89.88% <15.38%> (-3.11%)	⬇️
wandb/integration/tensorboard/monkeypatch.py	87.65% <0.00%> (-4.94%)	⬇️
wandb/sdk/lib/git.py	78.39% <0.00%> (ø)
wandb/sdk/wandb_run.py	90.95% <0.00%> (+0.29%)	⬆️
wandb/sdk/internal/tb_watcher.py	88.03% <0.00%> (+0.33%)	⬆️
wandb/integration/keras/keras.py	74.03% <0.00%> (+0.38%)	⬆️
wandb/util.py	86.33% <0.00%> (+0.43%)	⬆️
wandb/apis/public.py	82.19% <0.00%> (+0.43%)	⬆️
wandb/sdk/wandb_setup.py	88.50% <0.00%> (+0.50%)	⬆️
... and 44 more

[KyleGoyette]

LGTM, but lets write a test using both master and main so we'll know if this code path breaks.

[KyleGoyette]

🚢