### 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 reading_type = false;
	String cur_identifier;
	for (int i = _get_first_ident_pos(p_code); i < p_code.length(); i++) {
		if (p_code[i] == ';') {
			break;
		} else if (p_code[i] <= 32) {
			if (!cur_identifier.is_empty()) {
				if (!reading_type) {
					if (cur_identifier != "shader_type") {
						return String();
					}
					reading_type = true;
					cur_identifier = String();
				} else {
					return cur_identifier;
				}
			}
		} else {
			cur_identifier += String::chr(p_code[i]);
		}
	}
	if (reading_type) {
		return cur_identifier;
	}
	return String();
}
bool ShaderLanguage::is_builtin_func_out_parameter(const String &p_name, int p_param) {