### 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)

actions.usage_flag_pointers["BONE_INDICES"] = &uses_bones;
	actions.usage_flag_pointers["BONE_WEIGHTS"] = &uses_weights;
	actions.uniforms = &uniforms;
	Error err = MaterialStorage::get_singleton()->shaders.compiler_scene.compile(RS::SHADER_SPATIAL, code, &actions, path, gen_code);
	ERR_FAIL_COND_MSG(err != OK, "Shader compilation failed.");
	if (version.is_null()) {
		version = MaterialStorage::get_singleton()->shaders.scene_shader.version_create();
	}
	depth_draw = DepthDraw(depth_drawi);
	depth_test = DepthTest(depth_testi);
	cull_mode = Cull(cull_modei);
	blend_mode = BlendMode(blend_modei);
	alpha_antialiasing_mode = AlphaAntiAliasing(alpha_antialiasing_modei);
	vertex_input_mask = uint32_t(uses_normal);
	vertex_input_mask |= uses_tangent << 1;
	vertex_input_mask |= uses_color << 2;
	vertex_input_mask |= uses_uv << 3;
	vertex_input_mask |= uses_uv2 << 4;
	vertex_input_mask |= uses_custom0 << 5;
	vertex_input_mask |= uses_custom1 << 6;
	vertex_input_mask |= uses_custom2 << 7;
	vertex_input_mask |= uses_custom3 << 8;
	vertex_input_mask |= uses_bones << 9;
	vertex_input_mask |= uses_weights << 10;
	uses_screen_texture_mipmaps = gen_code.uses_screen_texture_mipmaps;
	uses_screen_texture = gen_code.uses_screen_texture;
	uses_depth_texture = gen_code.uses_depth_texture;
	uses_normal_texture = gen_code.uses_normal_roughness_texture;
	uses_vertex_time = gen_code.uses_vertex_time;
	uses_fragment_time = gen_code.uses_fragment_time;