Merge firefox: allow locking of *.sqlite-shm files in user cache area

Noticed a bunch of these after a Firefox 124.0 upgrade:

`Mar 25 22:08:27 darkstar kernel: [598271.991739] audit: type=1400 audit(1711418907.493:27323): apparmor="DENIED" operation="file_lock" profile="firefox" name="/home/username/.cache/mozilla/firefox/deadbeef.default/suggest.sqlite-shm" pid=2855447 comm=4267494F5468727E6F6C2023333530 requested_mask="k" denied_mask="k" fsuid=1000 ouid=1000`

Fixes: #380
MR: !1193


Approved-by: Christian Boltz <apparmor@cboltz.de>
Merged-by: Christian Boltz <apparmor@cboltz.de>
(cherry picked from commit 14572d95)
Signed-off-by: John Johansen <john.johansen@canonical.com>

profiles/apparmor/profiles/extras/firefox

@@ -241,7 +241,7 @@ profile firefox @{MOZ_LIBDIR}/@{MOZ_APP_NAME}{,*[^s][^h]} {
   owner @{HOME}/.gnome2/firefox* rwk,
   owner @{HOME}/.cache/mozilla/{,@{MOZ_APP_NAME}/} rw,
   owner @{HOME}/.cache/mozilla/@{MOZ_APP_NAME}/** rw,
-  owner @{HOME}/.cache/mozilla/@{MOZ_APP_NAME}/**/*.sqlite k,
+  owner @{HOME}/.cache/mozilla/@{MOZ_APP_NAME}/**/*.sqlite{,-shm} k,
   owner @{HOME}/.config/gtk-3.0/bookmarks r,
   owner @{HOME}/.config/dconf/user w,
   owner @{run}/user/[0-9]*/dconf/ w,