[clang] [llvm] [Offload] Unify offloading entries into a single section (PR #125731)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

> LGTM syntax-wise. Don't have much of an opinion on the strategy.
> 
> Are there existing users for this? Should we worry about providing backward compatibility with the "omp" sections in the existing binaries?

That part is fortunately baked-in, as the registration code that's statically linked into the application is the only part that touches the sections.

https://github.com/llvm/llvm-project/pull/125731