Merge pull request #11456 from sbidoul/setup_py_install_gone_in

Set deprecation deadlines for #8368 and #8559

Author: sbidoul

src/pip/_internal/utils/deprecation.py

@@ -155,7 +155,7 @@ def emit_deprecation(self, name: str) -> None:
         "method, because a wheel could not be built for it."
     ),
     replacement="to fix the wheel build issue reported above",
-    gone_in=None,
+    gone_in="23.1",
     issue=8368,
     emit_after_success=True,
 )
@@ -169,7 +169,7 @@ def emit_deprecation(self, name: str) -> None:
         "is not installed."
     ),
     replacement="to enable the '--use-pep517' option",
-    gone_in=None,
+    gone_in="23.1",
     issue=8559,
     emit_before_install=True,
 )