[llvm] [SPIRV] Do not use OpTypeRuntimeArray in Kernel env. (PR #149522)

[Steven Perron via llvm-commits]

https://github.com/s-perron commented:

I'm okay with this change. The only potential problem I see is that changing the size of the type could have other unintended consequences. I don't know if it might be more robust to change the type in the FE. This will make sure that any optimizations that rely on knowing the layout and size of a variable will be correct.

https://github.com/llvm/llvm-project/pull/149522