[llvm] [SPIR-V]: Memory leak fix in SPIRVEmitIntrinsics (PR #83015)

[Michal Paszkowski via llvm-commits]

michalpaszkowski wrote:

Thank you @bwlodarcz for the patch and coming up with the simplification for IRB! LGTM! Merging as requested.

https://github.com/llvm/llvm-project/pull/83015