### 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)

} break;
				case RS::GLOBAL_VAR_TYPE_INT: {
					pinfo.type = Variant::INT;
				} break;
				case RS::GLOBAL_VAR_TYPE_IVEC2: {
					pinfo.type = Variant::VECTOR2I;
				} break;
				case RS::GLOBAL_VAR_TYPE_IVEC3: {
					pinfo.type = Variant::VECTOR3I;
				} break;
				case RS::GLOBAL_VAR_TYPE_IVEC4: {
					pinfo.type = Variant::VECTOR4I;
				} break;
				case RS::GLOBAL_VAR_TYPE_RECT2I: {
					pinfo.type = Variant::RECT2I;
				} break;
				case RS::GLOBAL_VAR_TYPE_UINT: {
					pinfo.type = Variant::INT;
				} break;
				case RS::GLOBAL_VAR_TYPE_UVEC2: {
					pinfo.type = Variant::VECTOR2I;
				} break;
				case RS::GLOBAL_VAR_TYPE_UVEC3: {
					pinfo.type = Variant::VECTOR3I;
				} break;
				case RS::GLOBAL_VAR_TYPE_UVEC4: {
					pinfo.type = Variant::VECTOR4I;
				} break;
				case RS::GLOBAL_VAR_TYPE_FLOAT: {
					pinfo.type = Variant::FLOAT;