chore(gapic): use functools.cache instead of lru_cache in wrappers.py

Author: chalmerlowe

packages/gapic-generator/gapic/schema/wrappers.py

@@ -1290,19 +1290,13 @@ def _to_regex(self, path_template: str) -> Pattern:
         return re.compile(f"^{self._convert_to_regex(path_template)}$")
 
     # Use caching to avoid repeated computation
-    # TODO(https://github.com/googleapis/gapic-generator-python/issues/2161):
-    # Use `@functools.cache` instead of `@functools.lru_cache` once python 3.8 is dropped.
-    # https://docs.python.org/3/library/functools.html#functools.cache
-    @functools.lru_cache(maxsize=None)
+    @functools.cache
     def to_regex(self) -> Pattern:
         return self._to_regex(self.path_template)
 
     @property
     # Use caching to avoid repeated computation
-    # TODO(https://github.com/googleapis/gapic-generator-python/issues/2161):
-    # Use `@functools.cache` instead of `@functools.lru_cache` once python 3.8 is dropped.
-    # https://docs.python.org/3/library/functools.html#functools.cache
-    @functools.lru_cache(maxsize=None)
+    @functools.cache
     def key(self) -> Union[str, None]:
         if self.path_template == "":
             return self.field