### 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.render_mode_flags["wireframe"] = &wireframe;
	actions.render_mode_flags["particle_trails"] = &uses_particle_trails;
	actions.usage_flag_pointers["ALPHA"] = &uses_alpha;
	actions.usage_flag_pointers["ALPHA_SCISSOR_THRESHOLD"] = &uses_alpha_clip;
	
	
	actions.usage_flag_pointers["ALPHA_HASH_SCALE"] = &uses_alpha_clip;
	actions.render_mode_flags["depth_prepass_alpha"] = &uses_depth_prepass_alpha;
	actions.usage_flag_pointers["SSS_STRENGTH"] = &uses_sss;
	actions.usage_flag_pointers["SSS_TRANSMITTANCE_DEPTH"] = &uses_transmittance;
	actions.usage_flag_pointers["DISCARD"] = &uses_discard;
	actions.usage_flag_pointers["TIME"] = &uses_time;
	actions.usage_flag_pointers["ROUGHNESS"] = &uses_roughness;
	actions.usage_flag_pointers["NORMAL"] = &uses_normal;
	actions.usage_flag_pointers["NORMAL_MAP"] = &uses_normal;
	actions.usage_flag_pointers["POINT_SIZE"] = &uses_point_size;
	actions.usage_flag_pointers["POINT_COORD"] = &uses_point_size;
	actions.write_flag_pointers["MODELVIEW_MATRIX"] = &writes_modelview_or_projection;
	actions.write_flag_pointers["PROJECTION_MATRIX"] = &writes_modelview_or_projection;
	actions.write_flag_pointers["VERTEX"] = &uses_vertex;
	actions.write_flag_pointers["POSITION"] = &uses_position;
	actions.usage_flag_pointers["TANGENT"] = &uses_tangent;
	actions.usage_flag_pointers["BINORMAL"] = &uses_tangent;
	actions.usage_flag_pointers["COLOR"] = &uses_color;
	actions.usage_flag_pointers["UV"] = &uses_uv;
	actions.usage_flag_pointers["UV2"] = &uses_uv2;
	actions.usage_flag_pointers["CUSTOM0"] = &uses_custom0;
	actions.usage_flag_pointers["CUSTOM1"] = &uses_custom1;
	actions.usage_flag_pointers["CUSTOM2"] = &uses_custom2;
	actions.usage_flag_pointers["CUSTOM3"] = &uses_custom3;