### 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)

case RS::GLOBAL_VAR_TYPE_UVEC2: {
			return Vector2i();
		}
		case RS::GLOBAL_VAR_TYPE_UVEC3: {
			return Vector3i();
		}
		case RS::GLOBAL_VAR_TYPE_UVEC4: {
			Vector<int> v4;
			v4.resize(4);
			v4.write[0] = 0;
			v4.write[1] = 0;
			v4.write[2] = 0;
			v4.write[3] = 0;
			return v4;
		}
		case RS::GLOBAL_VAR_TYPE_FLOAT: {
			return 0.0;
		}
		case RS::GLOBAL_VAR_TYPE_VEC2: {
			return Vector2();
		}
		case RS::GLOBAL_VAR_TYPE_VEC3: {
			return Vector3();
		}
		case RS::GLOBAL_VAR_TYPE_VEC4: {
			return Quaternion();
		}
		case RS::GLOBAL_VAR_TYPE_RECT2: {
			return Rect2();
		}