_curses: improve bytes handling (#9007)

Author: JelleZijlstra

stdlib/_curses.pyi

@@ -1,9 +1,10 @@
 import sys
-from _typeshed import SupportsRead
+from _typeshed import ReadOnlyBuffer, SupportsRead
 from typing import IO, Any, NamedTuple, overload
 from typing_extensions import TypeAlias, final
 
 if sys.platform != "win32":
+    # Handled by PyCurses_ConvertToChtype in _cursesmodule.c.
     _ChType: TypeAlias = str | bytes | int
 
     # ACS codes are only initialized after initscr is called
@@ -330,7 +331,7 @@ if sys.platform != "win32":
     def noraw() -> None: ...
     def pair_content(__pair_number: int) -> tuple[int, int]: ...
     def pair_number(__attr: int) -> int: ...
-    def putp(__string: bytes) -> None: ...
+    def putp(__string: ReadOnlyBuffer) -> None: ...
     def qiflush(__flag: bool = ...) -> None: ...
     def raw(__flag: bool = ...) -> None: ...
     def reset_prog_mode() -> None: ...
@@ -352,7 +353,7 @@ if sys.platform != "win32":
     def tigetnum(__capname: str) -> int: ...
     def tigetstr(__capname: str) -> bytes | None: ...
     def tparm(
-        __str: bytes,
+        __str: ReadOnlyBuffer,
         __i1: int = ...,
         __i2: int = ...,
         __i3: int = ...,