bazel build fails with AttributeError module 'pkgutil' has no attribute 'ImpImporter'

[parthea]

When building a GAPIC with in a python 3.12 environment, the build fails with AttributeError: module 'pkgutil' has no attribute 'ImpImporter'. Did you mean: 'zipimporter'?. The stack trace is similar to the one in pypa/setuptools#3935. The issue is fixed in setuptools >=66.1.0.

We currently have a pin for setuptools in requirements.txt which is newer than setuptools 66.1.0, however the failure happens before this step.

gapic-generator-python/requirements.txt

Lines 429 to 432 in e46b7ad

	# The following packages are considered to be unsafe in a requirements file:
	setuptools==68.2.2 \
	--hash=sha256:4ac1475276d2f1c48684874089fefcd83bd7162ddaafb81fac866ba0db282a87 \
	--hash=sha256:b454a35605876da60632df1a60f736524eb73cc47bbc9f3f1ef1b644de74fd2a

There appears to be another pin to an earlier version of setuptools in rules_python. We're currently using rules_python version 0.24.0 which pins setuptools to 60.10.0

gapic-generator-python/WORKSPACE

Lines 25 to 34 in e46b7ad

	_rules_python_version = "0.24.0"
	_rules_python_sha256 = "0a8003b044294d7840ac7d9d73eef05d6ceb682d7516781a4ec62eeb34702578"
	http_archive(
	name = "rules_python",
	sha256 = _rules_python_sha256,
	strip_prefix = "rules_python-{}".format(_rules_python_version),
	url = "https://github.com/bazelbuild/rules_python/archive/{}.tar.gz".format(_rules_python_version),
	)

We should upgrade to rules_python version 0.26.0 which pins setuptools to 68.1.2. setuptools version 68.1.2 has the fix for the above AttributeError.