[llvm] [GlobalISel] Diagnose inline assembly constraint lowering errors (PR #135782)

[Pierre van Houtryve via llvm-commits]

Pierre-vh wrote:

> Needs tests

Until we have some form of error recovery testing will be difficult because the compiler crashes on failure
Do I need to add the recovery in this patch too?

https://github.com/llvm/llvm-project/pull/135782