Add test of packed struct that cannot be destructured
Add test of packed struct that cannot be destructured

Currently fails:

    error[E0509]: cannot move out of type `RemotePackedNonCopyDef`, which implements the `Drop` trait
       --> test_suite/tests/test_gen.rs:876:10
        |
    876 | #[derive(Deserialize)]
        |          ^^^^^^^^^^^
        |          |
        |          cannot move out of here
        |          data moved here
        |          move occurs because `__v1` has type `std::string::String`, which does not implement the `Copy` trait
        |
        = note: this error originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)

serde-rs/serde