[lld] [lld][MachO] Support for -interposable (PR #131813)

[Shoaib Meenai via llvm-commits]

smeenai wrote:

> You can repeat the same experiment with an executable and confirm that -interposable applies to it, as you said :)

Ah sorry, by this I meant that you were correct in what you'd said, not that I was asking you to run that experiment to verify it :) Either way though, the behavior change here looks good; we should just update the test to verify the stub instead of the lazy bind.

https://github.com/llvm/llvm-project/pull/131813