Enable Warnings as errors in Python tests (#102)

Part of rapidsai/build-planning#26, warnings in Python tests will now be treated as errors

Authors:
  - Matthew Roeschke (https://github.com/mroeschke)

Approvers:
  - Dante Gama Dessavre (https://github.com/dantegd)

URL: rapidsai/cuvs#102

python/cuvs/pyproject.toml

@@ -120,3 +120,8 @@ wheel.packages = ["cuvs"]
 provider = "scikit_build_core.metadata.regex"
 input = "cuvs/VERSION"
 regex = "(?P<value>.*)"
+
+[tool.pytest.ini_options]
+filterwarnings = [
+    "error",
+]