### 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)

bool result = true;
	if (p_datatype_a == TYPE_STRUCT || p_datatype_b == TYPE_STRUCT) {
		if (p_datatype_name_a != p_datatype_name_b) {
			result = false;
		}
	} else {
		if (p_datatype_a != p_datatype_b) {
			result = false;
		}
	}
	if (p_array_size_a != p_array_size_b) {
		result = false;
	}
	if (!result) {
		String type_name = p_datatype_a == TYPE_STRUCT ? p_datatype_name_a : get_datatype_name(p_datatype_a);
		if (p_array_size_a > 0) {
			type_name += "[";
			type_name += itos(p_array_size_a);
			type_name += "]";
		}
		String type_name2 = p_datatype_b == TYPE_STRUCT ? p_datatype_name_b : get_datatype_name(p_datatype_b);