nixosTests.terminal-emulators: Fix lomiri-terminal-app test after mesa change (#341573)

      konsole.pkg = p: p.plasma5Packages.konsole;

      lomiri-terminal-app.pkg = p: p.lomiri.lomiri-terminal-app;

      # after recent Mesa change, borked software rendering config under x86_64 icewm?

      # BGR colour display on x86_64, RGB on aarch64

      lomiri-terminal-app.colourTest = false;

      lxterminal.pkg = p: p.lxterminal;