Pin pytest version to avoid CI permission errors

The CI is failing with `pytest-8.0.0`: ``` E PermissionError: [Errno 13] Permission denied: '/lost+found/__init__.py' ``` [noissue]
pulp · Jan 30, 2024 · 3abe1d6 · 3abe1d6
1 parent b93b930
commit 3abe1d6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/functest_requirements.txt b/functest_requirements.txt
@@ -1,2 +1,2 @@
 pulp-smash @ git+https://github.com/pulp/pulp-smash.git
-pytest
+pytest==7.4.4