### 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 (function) {
		for (int i = 0; i < function->arguments.size(); i++) {
			if (function->arguments[i].name == p_identifier) {
				if (r_data_type) {
					*r_data_type = function->arguments[i].type;
				}
				if (r_struct_name) {
					*r_struct_name = function->arguments[i].type_str;
				}
				if (r_array_size) {
					*r_array_size = function->arguments[i].array_size;
				}
				if (r_is_const) {
					*r_is_const = function->arguments[i].is_const;
				}
				if (r_type) {
					*r_type = IDENTIFIER_FUNCTION_ARGUMENT;
				}
				return true;
			}
		}
	}
	if (shader->varyings.has(p_identifier)) {
		if (r_data_type) {
			*r_data_type = shader->varyings[p_identifier].type;
		}
		if (r_array_size) {
			*r_array_size = shader->varyings[p_identifier].array_size;
		}