[clang] [Driver][SPIR-V] Use consistent tools to convert between text and binary form (PR #120266)

[Nick Sarnie via cfe-commits]

sarnex wrote:

@bader Do you mind reviewing this as a member of the SPIR-V team (you already reviewed this internally) or recommend someone else to review, I'm having trouble finding someone :)

https://github.com/llvm/llvm-project/pull/120266