[llvm] Reapply [APInt] Enable APInt ctor assertion by default (PR #114539)

[Nikita Popov via llvm-commits]

nikic wrote:

@nathanchance I've applied a fix in https://github.com/llvm/llvm-project/commit/8851ea64a5d01fbf406383f13fcba347e730bc2d. Let me know if you see further issues.

https://github.com/llvm/llvm-project/pull/114539