[llvm] [ELF] Add support for CREL to getSectionAndRelocations (PR #126445)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

This is a stacked PR, serving as the base of #126446. Eventually I will put up another PR to support decoding stack size sections in the presence of CREL.

https://github.com/llvm/llvm-project/pull/126445