### 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)

String f = p_function.operator String();
	if ((f == "get_shader_parameter" || f == "set_shader_parameter") && p_idx == 0) {
		if (shader.is_valid()) {
			List<PropertyInfo> pl;
			shader->get_shader_uniform_list(&pl);
			for (const PropertyInfo &E : pl) {
				r_options->push_back(E.name.replace_first("shader_parameter/", "").quote());
			}
		}
	}
	Resource::get_argument_options(p_function, p_idx, r_options);
}
bool ShaderMaterial::_can_do_next_pass() const {
	return shader.is_valid() && shader->get_mode() == Shader::MODE_SPATIAL;
}
bool ShaderMaterial::_can_use_render_priority() const {
	return shader.is_valid() && shader->get_mode() == Shader::MODE_SPATIAL;
}
Shader::Mode ShaderMaterial::get_shader_mode() const {
	if (shader.is_valid()) {
		return shader->get_mode();
	} else {
		return Shader::MODE_SPATIAL;
	}
}
RID ShaderMaterial::get_shader_rid() const {