ruff

f0fe6d62 - Fix syntax error false positive on nested alternative patterns (#21104)

Fix syntax error false positive on nested alternative patterns (#21104) ## Summary Fixes #21101 by storing the child visitor's names in the parent visitor. This makes sure that `visitor.names` on line 1818 isn't empty after we visit a nested OR pattern. ## Test Plan New inline test cases derived from the issue, [playground](https://play.ruff.rs/7b6439ac-ee8f-4593-9a3e-c2aa34a595d0)