Lints while expanding builtin derives are not attributed to the correct AST nodes

[clubby789]

I tried this code:

#[deny(byte_slice_in_packed_struct_with_derive)]
#[repr(packed)]
#[derive(Hash)]
struct FlexZeroSlice {
    width: u8,
    data: [u8],
}

I expected to see this happen: The code does not compile, as the lint is triggered on the struct.

Instead, this happened: The code compiles with a warning, as the lint uses the crate-root NodeId for reporting.

(This lint specifically uses ast::CRATE_NODE_ID rather than ecx.current_expansion.lint_node_id, but the value of lint_node_id during builtin derive expansion is always ast::CRATE_NODE_ID)

Found while implementing a lint for #121053.

I had a brief go at fixing this but it looks like AST nodes are all still using dummy IDs at the point of builtin derive expansion and I'm unfamiliar with the AST renumbering