gsutil fails to run when PYTHONSAFEPATH=1 is set

[thirtyseven]

Host information

Python version: 3.11.x (from Homebrew)
OS: macOS 13.4.1

Steps to reproduce:

export PYTHONSAFEPATH=1
gsutil

Expected output:

Usage: gsutil [-D] [-DD] [-h header]... [-i service_account] [-m] [-o section:flag=value]... [-q] [-u user_project] [command [opts...] args...]
...

Actual output:

Traceback (most recent call last):
  File "/Users/tkaplan/google-cloud-sdk/bin/bootstrapping/gsutil.py", line 15, in <module>
    import bootstrapping
ModuleNotFoundError: No module named 'bootstrapping'

Context

bazel run sets this environment variable when running Python scripts (see https://github.com/bazelbuild/bazel/blob/b70914d269e1ee688a82606e92af6582bf67a56b/tools/python/python_bootstrap_template.txt#L485), this issue makes it difficult to shell out to gsutil from a Python script run by Bazel.

[siddharthab]

This is also true for gcloud by the way.