[llvm] [BOLT] Always run CheckLargeFunctions in non-relocation mode (PR #80922)

[Maksim Panchenko via llvm-commits]

maksfb wrote:

@mtvec, @yota9, I have added a couple of asserts that are x86-only. I found out that they are firing on RISC-V and Aarch64 which means `CheckLargeFunctions` doesn't always work. I briefly looked at the failures and they were all related to constant islands. We will need to adjust the size calculation and fitting requirements accordingly.

https://github.com/llvm/llvm-project/pull/80922