### 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)

material_data_request_func[RS::SHADER_CANVAS_ITEM] = _create_canvas_material_func;
	material_data_request_func[RS::SHADER_PARTICLES] = _create_particles_material_func;
	material_data_request_func[RS::SHADER_SKY] = _create_sky_material_func;
	material_data_request_func[RS::SHADER_FOG] = nullptr;
	static_assert(sizeof(GlobalShaderUniforms::Value) == 16);
	global_shader_uniforms.buffer_size = MAX(4096, (int)GLOBAL_GET("rendering/limits/global_shader_variables/buffer_size"));
	if (global_shader_uniforms.buffer_size > uint32_t(Config::get_singleton()->max_uniform_buffer_size)) {
		global_shader_uniforms.buffer_size = uint32_t(Config::get_singleton()->max_uniform_buffer_size);
		WARN_PRINT("Project setting \"rendering/limits/global_shader_variables/buffer_size\" exceeds maximum uniform buffer size of: " + itos(Config::get_singleton()->max_uniform_buffer_size));
	}
	global_shader_uniforms.buffer_values = memnew_arr(GlobalShaderUniforms::Value, global_shader_uniforms.buffer_size);
	memset(global_shader_uniforms.buffer_values, 0, sizeof(GlobalShaderUniforms::Value) * global_shader_uniforms.buffer_size);
	global_shader_uniforms.buffer_usage = memnew_arr(GlobalShaderUniforms::ValueUsage, global_shader_uniforms.buffer_size);
	global_shader_uniforms.buffer_dirty_regions = memnew_arr(bool, global_shader_uniforms.buffer_size / GlobalShaderUniforms::BUFFER_DIRTY_REGION_SIZE);
	memset(global_shader_uniforms.buffer_dirty_regions, 0, sizeof(bool) * global_shader_uniforms.buffer_size / GlobalShaderUniforms::BUFFER_DIRTY_REGION_SIZE);
	glGenBuffers(1, &global_shader_uniforms.buffer);
	glBindBuffer(GL_UNIFORM_BUFFER, global_shader_uniforms.buffer);
	glBufferData(GL_UNIFORM_BUFFER, sizeof(GlobalShaderUniforms::Value) * global_shader_uniforms.buffer_size, nullptr, GL_DYNAMIC_DRAW);
	glBindBuffer(GL_UNIFORM_BUFFER, 0);
	{
		
		ShaderCompiler::DefaultIdentifierActions actions;
		actions.renames["VERTEX"] = "vertex";
		actions.renames["LIGHT_VERTEX"] = "light_vertex";
		actions.renames["SHADOW_VERTEX"] = "shadow_vertex";
		actions.renames["UV"] = "uv";
		actions.renames["POINT_SIZE"] = "point_size";
		actions.renames["MODEL_MATRIX"] = "model_matrix";
		actions.renames["CANVAS_MATRIX"] = "canvas_transform";
		actions.renames["SCREEN_MATRIX"] = "screen_transform";