### 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)

if (p_property.name.begins_with("ao")) {
				p_property.usage = PROPERTY_USAGE_NONE;
			}
			if (p_property.name.begins_with("emission")) {
				p_property.usage = PROPERTY_USAGE_NONE;
			}
			if (p_property.name.begins_with("metallic")) {
				p_property.usage = PROPERTY_USAGE_NONE;
			}
			if (p_property.name.begins_with("rim")) {
				p_property.usage = PROPERTY_USAGE_NONE;
			}
			if (p_property.name.begins_with("roughness")) {
				p_property.usage = PROPERTY_USAGE_NONE;
			}
			if (p_property.name.begins_with("subsurf_scatter")) {
				p_property.usage = PROPERTY_USAGE_NONE;
			}
		}
		
		if (p_property.name.begins_with("anisotropy")) {
			p_property.usage = PROPERTY_USAGE_NONE;
		}
		if (p_property.name.begins_with("clearcoat")) {
			p_property.usage = PROPERTY_USAGE_NONE;
		}
		if (p_property.name.begins_with("normal")) {
			p_property.usage = PROPERTY_USAGE_NONE;
		}