Add preflight check on windows to verify minimum RAM required for a preset

[anjannath]

We are missing a check like below for windows platform:

crc/pkg/crc/preflight/preflight_checks_unix.go

Lines 58 to 68 in 9dfd795

	{
	configKeySuffix: "check-ram",
	checkDescription: "Checking minimum RAM requirements",
	check: func() error {
	return validation.ValidateEnoughMemory(constants.GetDefaultMemory(preset))
	},
	fixDescription: fmt.Sprintf("crc requires at least %s to run", units.HumanSize(float64(constants.GetDefaultMemory(preset)*1024*1024))),
	flags: NoFix,
	labels: None,
	},