### 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 (E.value.arguments.size()) {
							calltip += " ";
						}
						calltip += ")";
						r_call_hint = calltip;
						return OK;
					}
				}
			}
			while (builtin_func_defs[idx].name) {
				if (low_end && builtin_func_defs[idx].high_end) {
					idx++;
					continue;
				}
				int idx2 = 0;
				HashSet<int> out_args;
				while (builtin_func_out_args[idx2].name != nullptr) {
					if (builtin_func_out_args[idx2].name == builtin_func_defs[idx].name) {
						for (int i = 0; i < BuiltinFuncOutArgs::MAX_ARGS; i++) {
							int arg = builtin_func_out_args[idx2].arguments[i];
							if (arg == -1) {
								break;
							}
							out_args.insert(arg);
						}
						break;
					}
					idx2++;
				}