For some legacy tests, the LLVM-16 SPIR-V reader incorrectly emits
`align` attributes on non-pointer function arguments. This causes
failures in the LLVM verifier, which expects only pointer arguments to
have alignment attributes. This change removes the incorrect `align`
attributes from non-pointer function arguments in the SPIR-V reader.

(cherry picked from commit 45a4ad503c9cf84d14a3c9d11ac9c102f7c2fa1f)