[llvm] [SPIR-V] Add support for inline SPIR-V types (PR #125316)

[Steven Perron via llvm-commits]

s-perron wrote:

@michalpaszkowski This marks a significant change in the SPIR-V backend. We should be sure to discuss in the next SPIR-V backend meeting.

https://github.com/llvm/llvm-project/pull/125316