Convert test-recipes into local noarch packages

[kenodegard]

Description

In our tests we have a number of test recipes, specifically tests/test-recipes. Some of these recipes were built years ago and uploaded to the conda-test channel (e.g. https://anaconda.org/conda-test/b_post_link_package) and the others are built every time the tests runs, e.g.:

conda/tests/conftest.py

Lines 21 to 36 in 70aeb74

	def _conda_build_recipe(recipe):
	subprocess.run(
	["conda-build", str(Path(__file__).resolve().parent / "test-recipes" / recipe)],
	check=True,
	)
	return recipe
	@pytest.fixture(scope="session")
	def activate_deactivate_package():
	return _conda_build_recipe("activate_deactivate_package")
	@pytest.fixture(scope="session")
	def pre_link_messages_package():
	return _conda_build_recipe("pre_link_messages_package")

This is unnecessarily expensive so lets convert the recipes to noarch and add the packages directly to the repo so we don't have to rely on the conda-test channel!

Checklist - did you ...

• Add a file to the news directory (using the template) for the next release's release notes?
• Add / update necessary tests?
• Add / update outdated documentation?

[kenodegard]

We move the tarball into a temporary directory to avoid polluting subsequent tests.

[jezdez]

Excellent work!

[travishathaway]

LGTM 🚀