### 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)

pinfo.type = Variant::OBJECT;
				pinfo.hint = PROPERTY_HINT_RESOURCE_TYPE;
				pinfo.hint_string = "Texture2D";
			} break;
			case RS::GLOBAL_VAR_TYPE_SAMPLER2DARRAY: {
				pinfo.type = Variant::OBJECT;
				pinfo.hint = PROPERTY_HINT_RESOURCE_TYPE;
				pinfo.hint_string = "Texture2DArray";
			} break;
			case RS::GLOBAL_VAR_TYPE_SAMPLER3D: {
				pinfo.type = Variant::OBJECT;
				pinfo.hint = PROPERTY_HINT_RESOURCE_TYPE;
				pinfo.hint_string = "Texture3D";
			} break;
			case RS::GLOBAL_VAR_TYPE_SAMPLERCUBE: {
				pinfo.type = Variant::OBJECT;
				pinfo.hint = PROPERTY_HINT_RESOURCE_TYPE;
				pinfo.hint_string = "Cubemap";
			} break;
			default: {
			} break;
		}
		if (!overrides.has(variables[i])) {
			Override o;
			o.in_use = false;
			Callable::CallError ce;
			Variant::construct(pinfo.type, o.override, nullptr, 0, ce);
			overrides[variables[i]] = o;
		}
		Override *o = overrides.getptr(variables[i]);