### 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)

return false;
}
bool CanvasShaderData::casts_shadows() const {
	return false;
}
RS::ShaderNativeSourceCode CanvasShaderData::get_native_source_code() const {
	return MaterialStorage::get_singleton()->shaders.canvas_shader.version_get_native_source_code(version);
}
CanvasShaderData::CanvasShaderData() {
	valid = false;
	uses_screen_texture = false;
	uses_sdf = false;
}
CanvasShaderData::~CanvasShaderData() {
	if (version.is_valid()) {
		MaterialStorage::get_singleton()->shaders.canvas_shader.version_free(version);
	}
}
GLES3::ShaderData *GLES3::_create_canvas_shader_func() {
	CanvasShaderData *shader_data = memnew(CanvasShaderData);
	return shader_data;
}
void CanvasMaterialData::update_parameters(const HashMap<StringName, Variant> &p_parameters, bool p_uniform_dirty, bool p_textures_dirty) {