fixtures: change a lambda to partial

It makes for a more debuggable repr. Before:

    <function FixtureRequest._schedule_finalizers.<locals>.<lambda> at 0x7fe4ae32d440>

After:

    functools.partial(<bound method FixtureDef.finish of <FixtureDef argname='hello_package' scope='package' baseid=''>>, request=<SubRequest 'hello_package' for <Function test_hello>>)

src/_pytest/fixtures.py

@@ -698,7 +698,8 @@ class FixtureRequest:
         self, fixturedef: "FixtureDef[object]", subrequest: "SubRequest"
     ) -> None:
         # If fixture function failed it might have registered finalizers.
-        subrequest.node.addfinalizer(lambda: fixturedef.finish(request=subrequest))
+        finalizer = functools.partial(fixturedef.finish, request=subrequest)
+        subrequest.node.addfinalizer(finalizer)
 
     def _check_scope(
         self,