Remove async_late_forward_entry_setups and instead implicitly hold the lock (#119088)

* Refactor config entry forwards to implictly obtain the lock instead of explictly

This is a bit of a tradeoff to not need async_late_forward_entry_setups

The downside is we can no longer detect non-awaited plastform setups
as we will always implicitly obtain the lock instead of explictly.

Note, this PR is incomplete and is only for discussion purposes
at this point

* preen

* cover

* cover

* restore check for non-awaited platform setup

* cleanup

* fix missing word

* make non-awaited test safer

tests/ignore_uncaught_exceptions.py

@@ -13,6 +13,12 @@ IGNORE_UNCAUGHT_EXCEPTIONS = [
         "tests.helpers.test_event",
         "test_track_point_in_time_repr",
     ),
+    (
+        # This test explicitly throws an uncaught exception
+        # and should not be removed.
+        "tests.test_config_entries",
+        "test_config_entry_unloaded_during_platform_setups",
+    ),
     (
         # This test explicitly throws an uncaught exception
         # and should not be removed.