Fix incorrect Self import from typing instead of typing_extensions

Author: Avasam

changelog/12744.bugfix.rst

@@ -0,0 +1 @@
+Replaced `typing.Self` with `typing_extensions.Self` -- by :user:`Avasam`

src/_pytest/doctest.py

@@ -44,7 +44,8 @@
 
 if TYPE_CHECKING:
     import doctest
-    from typing import Self
+
+    from typing_extensions import Self
 
 DOCTEST_REPORT_CHOICE_NONE = "none"
 DOCTEST_REPORT_CHOICE_CDIFF = "cdiff"

src/_pytest/nodes.py

@@ -43,7 +43,7 @@
 
 
 if TYPE_CHECKING:
-    from typing import Self
+    from typing_extensions import Self
 
     # Imported here due to circular import.
     from _pytest.main import Session

src/_pytest/python.py

@@ -78,7 +78,7 @@
 
 
 if TYPE_CHECKING:
-    from typing import Self
+    from typing_extensions import Self
 
 
 def pytest_addoption(parser: Parser) -> None: