Disable systemd-oomd when MATE desktop is used

Error: package mate-desktop-configs-1.26.0-5.fc36.noarch conflicts with
	   systemd-oomd-defaults provided by
	   systemd-oomd-defaults-250.3-8.fc36.noarch


“systemd-oomd” breaks “Mate-desktop”.
Use “earlyoom”, which was use before f34.