bug#47731: 28.0.50; Switching frame via keyboard does not fire focus change event

[Sean Farley via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Here is some testing code:
(defun test--focus-out ()
  (message "FOCUS TEST"))

(add-function :after after-focus-change-function #'test--focus-out)
(make-frame)

On macOS, this code runs fine if you click on the other frame. But if
using the keyboard shortcut Command-` the event doesn't fire. It seems
to be some interaction in the keydown event function where emacs_event
is cleared before the call to windowDidBecomeKey.


In GNU Emacs 28.0.50 (build 2, x86_64-apple-darwin20.3.0, NS appkit-2022.30 Version 11.2.2 (Build 20D80))
 of 2021-03-09 built on laptop
Windowing system distributor 'Apple', version 10.3.2022
System Description:  macOS 11.2.3

Configured using:
 'configure --disable-dependency-tracking --disable-silent-rules
 --enable-locallisppath=/usr/local/share/emacs/site-lisp
 --infodir=/usr/local/Cellar/emacs-plus@28/28.0.50/share/info/emacs
 --prefix=/usr/local/Cellar/emacs-plus@28/28.0.50 --with-xml2
 --with-gnutls --with-native-compilation --with-dbus --with-imagemagick
 --with-modules --with-rsvg --with-ns --disable-ns-self-contained
 'CFLAGS=-I/usr/local/opt/gcc/include -I/usr/local/opt/libgccjit/include
 -I/usr/local/opt/gmp/include -I/usr/local/opt/jpeg/include'
 'LDFLAGS=-L/usr/local/lib/gcc/10 -I/usr/local/opt/gcc/include
 -I/usr/local/opt/libgccjit/include -I/usr/local/opt/gmp/include
 -I/usr/local/opt/jpeg/include''

Configured features:
ACL DBUS GIF GLIB GMP GNUTLS IMAGEMAGICK JPEG JSON LCMS2 LIBXML2 MODULES
NATIVE_COMP NOTIFY KQUEUE NS PDUMPER PNG RSVG THREADS TIFF
TOOLKIT_SCROLL_BARS XIM ZLIB

Important settings:
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Major mode: ObjC//l

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  size-indication-mode: t
  column-number-mode: t
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