### Godot version

v4.1.dev.custom_build.a7276f1ce

### System information

Win10, AMD 2600, GeForce GTX 1060, Vulkan API 1.3.205

### Issue description

I can't get correct color data from an array of source_color type.
The color data is saved as **Color** in the file:
`shader_parameter/palette = [Color (1, 0, 0, 1), Color (0, 1, 0, 1), Color (0, 0, 1, 1)]`
Shouldn't it be saved as PackedColorArray?


### Steps to reproduce

1.Declare an array of source_color type.
2.Set colors.

### Minimal reproduction project

[shadertest.zip](https://github.com/godotengine/godot/files/11246504/shadertest.zip)

Vector<StringName> variables;
	variables = RS::get_singleton()->global_shader_parameter_get_list();
	for (int i = 0; i < variables.size(); i++) {
		PropertyInfo pinfo;
		pinfo.name = "params/" + variables[i];
		pinfo.usage = PROPERTY_USAGE_EDITOR | PROPERTY_USAGE_CHECKABLE;
		switch (RS::get_singleton()->global_shader_parameter_get_type(variables[i])) {
			case RS::GLOBAL_VAR_TYPE_BOOL: {
				pinfo.type = Variant::BOOL;
			} break;
			case RS::GLOBAL_VAR_TYPE_BVEC2: {
				pinfo.type = Variant::INT;
				pinfo.hint = PROPERTY_HINT_FLAGS;
				pinfo.hint_string = "x,y";
			} break;
			case RS::GLOBAL_VAR_TYPE_BVEC3: {
				pinfo.type = Variant::INT;
				pinfo.hint = PROPERTY_HINT_FLAGS;
				pinfo.hint_string = "x,y,z";
			} break;
			case RS::GLOBAL_VAR_TYPE_BVEC4: {
				pinfo.type = Variant::INT;
				pinfo.hint = PROPERTY_HINT_FLAGS;
				pinfo.hint_string = "x,y,z,w";
			} break;
			case RS::GLOBAL_VAR_TYPE_INT: {