[libclc] [libclc] Remove clspv-specific clc conversions (PR #128500)

[Fraser Cormack via cfe-commits]

frasercrmck wrote:

> This commit is causing regressions on the OpenCL-CTS with `clvk/clspv`. I need more time to understand what the issue is exactly.

Interesting, I'm sorry about that. I diffed `clc-convert.cl` and `clc-clspv-convert.cl` before this change and they were identical, so the change in principle should be fine. Perhaps I messed up one of the changes to the booleans in the python script and forgot to verify?

https://github.com/llvm/llvm-project/pull/128500