use pyupgrade to update to new typing syntax (#31580)

* add pyupgrade hook

* run pyupgrade (pre-commit run -a)

* ruff --fix

* Revert "add pyupgrade hook"

This reverts commit 56ec18b.

* revert changes to third_party/

* manual type fixes

* explicit Optional wrapping capnp objects
old-commit-hash: 995250a

Author: incognitojam

common/file_helpers.py

@@ -1,7 +1,6 @@
 import os
 import tempfile
 import contextlib
-from typing import Optional
 
 
 class CallbackReader:
@@ -24,7 +23,7 @@ def read(self, *args, **kwargs):
 
 
 @contextlib.contextmanager
-def atomic_write_in_dir(path: str, mode: str = 'w', buffering: int = -1, encoding: Optional[str] = None, newline: Optional[str] = None,
+def atomic_write_in_dir(path: str, mode: str = 'w', buffering: int = -1, encoding: str | None = None, newline: str | None = None,
                         overwrite: bool = False):
   """Write to a file atomically using a temporary file in the same directory as the destination file."""
   dir_name = os.path.dirname(path)

common/gpio.py

@@ -1,6 +1,5 @@
 import os
 from functools import lru_cache
-from typing import Optional, List
 
 def gpio_init(pin: int, output: bool) -> None:
   try:
@@ -16,7 +15,7 @@ def gpio_set(pin: int, high: bool) -> None:
   except Exception as e:
     print(f"Failed to set gpio {pin} value: {e}")
 
-def gpio_read(pin: int) -> Optional[bool]:
+def gpio_read(pin: int) -> bool | None:
   val = None
   try:
     with open(f"/sys/class/gpio/gpio{pin}/value", 'rb') as f:
@@ -37,15 +36,15 @@ def gpio_export(pin: int) -> None:
     print(f"Failed to export gpio {pin}")
 
 @lru_cache(maxsize=None)
-def get_irq_action(irq: int) -> List[str]:
+def get_irq_action(irq: int) -> list[str]:
   try:
     with open(f"/sys/kernel/irq/{irq}/actions") as f:
       actions = f.read().strip().split(',')
       return actions
   except FileNotFoundError:
     return []
 
-def get_irqs_for_action(action: str) -> List[str]:
+def get_irqs_for_action(action: str) -> list[str]:
   ret = []
   with open("/proc/interrupts") as f:
     for l in f.readlines():