### 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)

pi.type = Variant::ARRAY;
				pi.hint = PROPERTY_HINT_ARRAY_TYPE;
				pi.hint_string = MAKE_RESOURCE_TYPE_HINT("Texture3D");
			} else {
				pi.type = Variant::OBJECT;
				pi.hint = PROPERTY_HINT_RESOURCE_TYPE;
				pi.hint_string = "Texture3D";
			}
		} break;
		case ShaderLanguage::TYPE_STRUCT: {
			
		} break;
		case ShaderLanguage::TYPE_MAX:
			break;
	}
	return pi;
}
uint32_t ShaderLanguage::get_datatype_size(ShaderLanguage::DataType p_type) {
	switch (p_type) {
		case TYPE_VOID:
			return 0;
		case TYPE_BOOL:
			return 4;
		case TYPE_BVEC2:
			return 8;
		case TYPE_BVEC3:
			return 12;
		case TYPE_BVEC4:
			return 16;
		case TYPE_INT: