fix(launch): allow spaces in requirements file, remove duplicate wandb bootstrap file

[TimH98]

Fixes WB-11794

Description

_wandb_bootstrap.py was failing to handle the case where a requirement is specified as xyz @ ... due to spaces being present. This change removes the spaces, fixing the behavior.

Also removed sdk/launch/templates/_wandb_bootstrap.py, since it was a duplicate of sdk/launch/builder/templates/_wandb_bootstrap.py

Testing

1. cd to wandb/sdk/launch/builder/templates/
2. Create a requirements.frozen.txt file with the contents:

python-package-example
example-pypi-package @ https://files.pythonhosted.org/packages/93/8d/e1e98360dc899e533cb3dd857494f2571b129bdffcee76365009b2bb507c/example_pypi_package-0.1.0.tar.gz
python-example-package

3. Run python _wandb_bootstrap.py
4. Run pip list | grep 'example', confirm that the three example packages were installed
5. Cleanup: Run pip uninstall -r requirements.frozen.txt -y

Also ran tox -e pylaunch38

[codecov]

Codecov Report

Merging #4647 (d092f86) into main (709a60d) will decrease coverage by 0.00%.
The diff coverage is n/a.

❗ Current head d092f86 differs from pull request most recent head 065cc7c. Consider uploading reports for the commit 065cc7c to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4647      +/-   ##
==========================================
- Coverage   83.22%   83.22%   -0.01%     
==========================================
  Files         279      279              
  Lines       34917    34917              
==========================================
- Hits        29060    29058       -2     
- Misses       5857     5859       +2     

Flag	Coverage Δ
functest	56.08% <ø> (+0.04%)	⬆️
unittest	73.77% <ø> (-0.03%)	⬇️

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

Impacted Files	Coverage Δ
wandb/util.py	87.44% <0.00%> (-0.41%)	⬇️
wandb/sdk/wandb_run.py	90.66% <0.00%> (-0.24%)	⬇️
wandb/sdk/lib/git.py	77.71% <0.00%> (ø)
wandb/filesync/step_prepare.py	94.93% <0.00%> (+1.26%)	⬆️
wandb/sdk/internal/system/system_info.py	91.55% <0.00%> (+3.24%)	⬆️