[llvm] [SPIR-V] Fix direct return of aggregate extractvalue (PR #209762)

[Dmitry Sidorov via llvm-commits]

MrSidims wrote:

> Replaces https://github.com/llvm/llvm-project/pull/209027 (that PR seems spam? although the diagnosis was largely correct)

I kinda feel, that rewrite everything related to type lowering in the SPIR-V backend might be not that bad of an idea :)

https://github.com/llvm/llvm-project/pull/209762