Remove generated Python client from git tracking (#1810)

After #1675, we now generate the Python client on-demand when it's needed by tests or the CLI. With this, we can safely remove the Python client from being tracked in the repo and add its files to .gitignore

Author: eric-maynard

.gitignore

@@ -28,6 +28,8 @@ client/python/poetry.lock
 /poetry.lock
 /polaris-venv/
 /pyproject.toml
+/client/python/
+!/client/python/pyproject.toml
 
 # Polaris CLI profile
 .polaris.json