### 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)

transmittance_boost = p_boost;
	RS::get_singleton()->material_set_param(_get_material(), shader_names->transmittance_boost, p_boost);
}
float BaseMaterial3D::get_transmittance_boost() const {
	return transmittance_boost;
}
void BaseMaterial3D::set_backlight(const Color &p_backlight) {
	backlight = p_backlight;
	RS::get_singleton()->material_set_param(_get_material(), shader_names->backlight, backlight);
}
Color BaseMaterial3D::get_backlight() const {
	return backlight;
}
void BaseMaterial3D::set_refraction(float p_refraction) {
	refraction = p_refraction;
	RS::get_singleton()->material_set_param(_get_material(), shader_names->refraction, refraction);
}
float BaseMaterial3D::get_refraction() const {
	return refraction;
}
void BaseMaterial3D::set_detail_uv(DetailUV p_detail_uv) {
	if (detail_uv == p_detail_uv) {
		return;
	}
	detail_uv = p_detail_uv;
	_queue_shader_change();
}
BaseMaterial3D::DetailUV BaseMaterial3D::get_detail_uv() const {