Fix various py310 stubtest errors (#7239)

stdlib/unicodedata.pyi

@@ -3,9 +3,11 @@ from typing import Any, TypeVar
 from typing_extensions import final
 
 ucd_3_2_0: UCD
-ucnhash_CAPI: Any
 unidata_version: str
 
+if sys.version_info < (3, 10):
+    ucnhash_CAPI: Any
+
 _T = TypeVar("_T")
 
 def bidirectional(__chr: str) -> str: ...