Fix warning filtering in pytest configuration

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

Author: llucax

pyproject.toml

@@ -144,7 +144,18 @@ disable = [
 ]
 
 [tool.pytest.ini_options]
-addopts = "-W=all -Werror -Wdefault::DeprecationWarning -Wdefault::PendingDeprecationWarning '-Wdefault:Protobuf gencode version 5.27.2 is exactly one major version older than the runtime version:UserWarning' -vv"
+addopts = "-vv"
+filterwarnings = [
+  "error",
+  "once::DeprecationWarning",
+  "once::PendingDeprecationWarning",
+  # We ignore warnings about protobuf gencode version being one version older
+  # than the current version, as this is supported by protobuf, and we expect to
+  # have such cases. If we go too far, we will get a proper error anyways.
+  # We use a raw string (single quotes) to avoid the need to escape special
+  # characters as this is a regex.
+  'ignore:Protobuf gencode version .*exactly one major version older.*:UserWarning',
+]
 testpaths = ["tests", "src"]
 asyncio_mode = "auto"
 asyncio_default_fixture_loop_scope = "function"