Handle instalaltion of kernel modules in another transaction

I first installed the kernel, then kernel-module-v4l2loopback-5.10-generic.
modinfo did not see it, I had to run depmod manually.
Move it to file trigger.
Remove absolute paths.

kernel.spec

@@ -32,7 +32,7 @@
 %define sublevel 73
 
 # Release number. Increase this before a rebuild.
-%define rpmrel 2
+%define rpmrel 3
 %define fullrpmrel	%{rpmrel}
 
 %define rpmtag		%{disttag}
@@ -535,18 +535,22 @@ input and output, etc. This is a general-purpose kernel.
 # that is created then will be non-functional. But when the user installs
 # kernel-<...> package, that defunct initrd will be replaced with a working
 # one here.
-#
-# depmod is also needed, because some DKMS-modules might have been installed
-# when the devel package was installed but that was before the main modules
-# were installed.
-# This is also the reason the devel package is in Requires(post) for this
-# package now: it must be installed completely before we call depmod here.
-/sbin/depmod -a %{kver_full}
-/sbin/dracut -f %{initrd_path} %{kver_full}
+dracut -f %{initrd_path} %{kver_full}
 
 # File triggers from grub packages will handle this.
 #/usr/sbin/update-grub2
 
+%transfiletriggerin -- %{_modulesdir}/%{kver_full}
+# Detect all modules, including ones inside kernel-module* packages
+if grep -qE '/.*\.ko(|\..*)' ; then
+	depmod -a %{kver_full}
+fi
+
+%transfiletriggerpostun -- %{_modulesdir}/%{kver_full}
+# Handle e.g. removal of kernel-module* packages
+# List of files is not available here (?)
+depmod -a %{kver_full}
+
 %files -f %{kernel_files}
 %{_bootdir}/System.map-%{kver_full}
 %{_bootdir}/symvers-%{kver_full}.zst