bug#55578: 29.0.50; auto-revert-use-notify vs 'git checkout -- <file>'

[miha]

Visit a file in a clean git repository, modify it and save its buffer.
Turn on auto-revert-mode in its buffer.

Run 'git checkout -- <filename>' and notice that auto-revert-mode
doesn't revert the buffer immediately using 'notify', it only reverts it
according to auto-revert-interval.

This is in contrast to modifying the file with a command like
'echo test >> <filename>', after which auto-revert-mode reverts the
buffer instantly using 'notify'.

This seems to be because prior to writing the file, 'git checkout'
unlinks it first. It would be nice if auto-revert-mode worked with
notify in such cases as well.

git version 2.36.0
cpu: x86_64
no commit associated with this build
sizeof-long: 8
sizeof-size_t: 8
shell-path: /bin/sh

In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.33, cairo 
version 1.17.6)
 of 2022-04-20 built on miha-pc
Repository revision: 4714f34928c12cc9ebda7c115526db4aa87c0d51
Repository branch: tmp
Windowing system distributor 'The X.Org Foundation', version 11.0.12101003
System Description: Artix Linux

Configured using:
 'configure --without-libsystemd --with-native-compilation'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY
PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS
WEBP X11 XDBE XIM XPM GTK3 ZLIB

Important settings:
  value of $LANG: en_US.utf8
  locale-coding-system: utf-8-unix

Major mode: Fundamental

Minor modes in effect:
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  indent-tabs-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
None found.

Features:
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dired dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg
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make-network-process native-compile emacs)

Memory information:
((conses 16 59212 9167)
 (symbols 48 5734 0)
 (strings 32 16445 1783)
 (string-bytes 1 547865)
 (vectors 16 11787)
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