Incorrect dependency loop from struct default value

[Vexu]

Found in bun:

const S = struct {
    s: *S = &S.instance,
    var instance: S = undefined;
};
comptime {
    _ = S.instance;
}

[ianprime0509]

It looks like this should have been closed with #17692, since it was added as a behavior test in that PR: https://github.com/ziglang/zig/pull/17692/files#diff-e88bfbf758018704fbee1f67030cab3ba987e51e7c1516fe2cbf5bccf0dbfbf5R1809-R1824