Ignore warning about Protobuf gencode version

These warnings are expected during transitional periods, when there is
an incompatibility we'll get an error instead.

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

pyproject.toml

@@ -166,7 +166,15 @@ disable = [
 ]
 
 [tool.pytest.ini_options]
-addopts = "-W=all -Werror -Wdefault::DeprecationWarning -Wdefault::PendingDeprecationWarning -vv"
+addopts = "-vv"
+filterwarnings = [
+  "error",
+  "once::DeprecationWarning",
+  "once::PendingDeprecationWarning",
+  # We use a raw string (single quote) to avoid the need to escape special
+  # chars as this is a regex
+  'ignore:Protobuf gencode version .*exactly one major version older.*:UserWarning',
+]
 testpaths = ["pytests"]
 
 [tool.mypy]