[clang] [llvm] [SPIRV] Add support for the `SPV_EXT_long_vector` extension (PR #210279)

[Aiden Grossman via cfe-commits]

boomanaiden154 wrote:

https://github.com/llvm/llvm-project/pull/219207 to fix the release-noassertions failure.

https://github.com/llvm/llvm-project/pull/210279