is_zipfile() also accepts bytes paths (#7106)

Use a protocol for is_zipfile(), instead of IO

stdlib/zipfile.pyi

@@ -1,6 +1,6 @@
 import io
 import sys
-from _typeshed import Self, StrPath
+from _typeshed import Self, StrOrBytesPath, StrPath
 from os import PathLike
 from types import TracebackType
 from typing import IO, Any, Callable, Iterable, Iterator, Protocol, Sequence, overload
@@ -25,6 +25,12 @@ class _ZipStream(Protocol):
     # def tell(self) -> int: ...
     # def seek(self, __n: int) -> object: ...
 
+# Stream shape as required by _EndRecData() and _EndRecData64().
+class _SupportsReadSeekTell(Protocol):
+    def read(self, __n: int = ...) -> bytes: ...
+    def seek(self, __cookie: int, __whence: int) -> object: ...
+    def tell(self) -> int: ...
+
 class _ClosableZipStream(_ZipStream, Protocol):
     def close(self) -> object: ...
 
@@ -262,7 +268,7 @@ if sys.version_info >= (3, 8):
 
         def __truediv__(self, add: StrPath) -> Path: ...
 
-def is_zipfile(filename: StrPath | IO[bytes]) -> bool: ...
+def is_zipfile(filename: StrOrBytesPath | _SupportsReadSeekTell) -> bool: ...
 
 ZIP_STORED: int
 ZIP_DEFLATED: int