Always use _typeshed.Self, where applicable (#6880)

* Always use `_typeshed.Self`, where applicable

* Revert changes to `google-cloud-ndb` (ambiguous)

* Remove empty line added by script

* Revert changes to `stubs/python-dateutil/dateutil/relativedelta.pyi`

* Manually add a few more that the script missed

* Improve `filelock` annotation

Source code here: 79ec7b2826/src/filelock/_api.py (L207)

* Improve `opentracing/scope` annotation

Source code here: 3e1d357a34/opentracing/scope.py (L71)

* Improve `redis/client` stub

Source code here: 15f315a496/redis/client.py (L1217)

* Improve `redis/lock` annotation

Source code here: 15f315a496/redis/lock.py (L155)

* Improve `requests/models` annotation

Source code here: d718e75383/requests/models.py (L653)

stdlib/tarfile.pyi

@@ -5,11 +5,9 @@ from _typeshed import Self, StrOrBytesPath, StrPath
 from collections.abc import Callable, Iterable, Iterator, Mapping
 from gzip import _ReadableFileobj as _GzipReadableFileobj, _WritableFileobj as _GzipWritableFileobj
 from types import TracebackType
-from typing import IO, Protocol, TypeVar, overload
+from typing import IO, Protocol, overload
 from typing_extensions import Literal
 
-_TF = TypeVar("_TF", bound=TarFile)
-
 class _Fileobj(Protocol):
     def read(self, __size: int) -> bytes: ...
     def write(self, __b: bytes) -> object: ...
@@ -133,7 +131,7 @@ class TarFile:
     def __iter__(self) -> Iterator[TarInfo]: ...
     @classmethod
     def open(
-        cls: type[_TF],
+        cls: type[Self],
         name: StrOrBytesPath | None = ...,
         mode: str = ...,
         fileobj: IO[bytes] | None = ...,  # depends on mode
@@ -148,10 +146,10 @@ class TarFile:
         pax_headers: Mapping[str, str] | None = ...,
         debug: int | None = ...,
         errorlevel: int | None = ...,
-    ) -> _TF: ...
+    ) -> Self: ...
     @classmethod
     def taropen(
-        cls: type[_TF],
+        cls: type[Self],
         name: StrOrBytesPath | None,
         mode: Literal["r", "a", "w", "x"] = ...,
         fileobj: _Fileobj | None = ...,
@@ -165,11 +163,11 @@ class TarFile:
         pax_headers: Mapping[str, str] | None = ...,
         debug: int | None = ...,
         errorlevel: int | None = ...,
-    ) -> _TF: ...
+    ) -> Self: ...
     @overload
     @classmethod
     def gzopen(
-        cls: type[_TF],
+        cls: type[Self],
         name: StrOrBytesPath | None,
         mode: Literal["r"] = ...,
         fileobj: _GzipReadableFileobj | None = ...,
@@ -183,11 +181,11 @@ class TarFile:
         pax_headers: Mapping[str, str] | None = ...,
         debug: int | None = ...,
         errorlevel: int | None = ...,
-    ) -> _TF: ...
+    ) -> Self: ...
     @overload
     @classmethod
     def gzopen(
-        cls: type[_TF],
+        cls: type[Self],
         name: StrOrBytesPath | None,
         mode: Literal["w", "x"],
         fileobj: _GzipWritableFileobj | None = ...,
@@ -201,11 +199,11 @@ class TarFile:
         pax_headers: Mapping[str, str] | None = ...,
         debug: int | None = ...,
         errorlevel: int | None = ...,
-    ) -> _TF: ...
+    ) -> Self: ...
     @overload
     @classmethod
     def bz2open(
-        cls: type[_TF],
+        cls: type[Self],
         name: StrOrBytesPath | None,
         mode: Literal["w", "x"],
         fileobj: _Bz2WritableFileobj | None = ...,
@@ -219,11 +217,11 @@ class TarFile:
         pax_headers: Mapping[str, str] | None = ...,
         debug: int | None = ...,
         errorlevel: int | None = ...,
-    ) -> _TF: ...
+    ) -> Self: ...
     @overload
     @classmethod
     def bz2open(
-        cls: type[_TF],
+        cls: type[Self],
         name: StrOrBytesPath | None,
         mode: Literal["r"] = ...,
         fileobj: _Bz2ReadableFileobj | None = ...,
@@ -237,10 +235,10 @@ class TarFile:
         pax_headers: Mapping[str, str] | None = ...,
         debug: int | None = ...,
         errorlevel: int | None = ...,
-    ) -> _TF: ...
+    ) -> Self: ...
     @classmethod
     def xzopen(
-        cls: type[_TF],
+        cls: type[Self],
         name: StrOrBytesPath | None,
         mode: Literal["r", "w", "x"] = ...,
         fileobj: IO[bytes] | None = ...,
@@ -254,7 +252,7 @@ class TarFile:
         pax_headers: Mapping[str, str] | None = ...,
         debug: int | None = ...,
         errorlevel: int | None = ...,
-    ) -> _TF: ...
+    ) -> Self: ...
     def getmember(self, name: str) -> TarInfo: ...
     def getmembers(self) -> _list[TarInfo]: ...
     def getnames(self) -> _list[str]: ...