nixosTest.lvm2: remove 4.19 kernel, test on 6.6

All tests continue to pass except for `nixosTests.lvm2.lvm-raid-sd-stage-1-linux-5_15` which continues to fail due to not having a kernel with the appropriate options configured.

Changed files
+1 -1
nixos
tests
+1 -1
nixos/tests/lvm2/default.nix
···
pkgs ? import ../../.. { inherit system config; },
lib ? pkgs.lib,
kernelVersionsToTest ? [
-
"4.19"
"5.4"
"5.10"
"5.15"
"6.1"
+
"6.6"
"latest"
],
}: