### 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)

if (shader.is_valid()) {
		return shader->get_rid();
	} else {
		return RID();
	}
}
ShaderMaterial::ShaderMaterial() {
}
ShaderMaterial::~ShaderMaterial() {
}
Mutex BaseMaterial3D::material_mutex;
SelfList<BaseMaterial3D>::List BaseMaterial3D::dirty_materials;
HashMap<BaseMaterial3D::MaterialKey, BaseMaterial3D::ShaderData, BaseMaterial3D::MaterialKey> BaseMaterial3D::shader_map;
BaseMaterial3D::ShaderNames *BaseMaterial3D::shader_names = nullptr;
void BaseMaterial3D::init_shaders() {
	shader_names = memnew(ShaderNames);
	shader_names->albedo = "albedo";
	shader_names->specular = "specular";
	shader_names->roughness = "roughness";
	shader_names->metallic = "metallic";
	shader_names->emission = "emission";
	shader_names->emission_energy = "emission_energy";
	shader_names->normal_scale = "normal_scale";
	shader_names->rim = "rim";
	shader_names->rim_tint = "rim_tint";
	shader_names->clearcoat = "clearcoat";