Add new http.HTTPStatus/__init__.pyi for Python3.12 (#10296)

Author: sobolevn

Diff for: stdlib/http/__init__.pyi

@@ -79,6 +79,17 @@ class HTTPStatus(IntEnum):
         EARLY_HINTS: Literal[103]
         IM_A_TEAPOT: Literal[418]
         TOO_EARLY: Literal[425]
+    if sys.version_info >= (3, 12):
+        @property
+        def is_informational(self) -> bool: ...
+        @property
+        def is_success(self) -> bool: ...
+        @property
+        def is_redirection(self) -> bool: ...
+        @property
+        def is_client_error(self) -> bool: ...
+        @property
+        def is_server_error(self) -> bool: ...
 
 if sys.version_info >= (3, 11):
     class HTTPMethod(StrEnum):

Diff for: tests/stubtest_allowlists/py312.txt

@@ -30,11 +30,6 @@ enum.property.member
 genericpath.__all__
 genericpath.islink
 gzip.GzipFile.filename
-http.HTTPStatus.is_client_error
-http.HTTPStatus.is_informational
-http.HTTPStatus.is_redirection
-http.HTTPStatus.is_server_error
-http.HTTPStatus.is_success
 http.client.HTTPConnection.get_proxy_response_headers
 http.client.HTTPSConnection.__init__
 imaplib.IMAP4_SSL.__init__