[llvm] [APInt] Remove multiplicativeInverse with explicit modulus (PR #87644)

[Jay Foad via llvm-commits]

jayfoad wrote:

> Note, this will also have valid uses in MLIR as part of a new polynomial dialect (cf. #72081, subsequent PRs will have lowerings that need this inverse calculation)

Fair enough, when there are in-tree MLIR uses we can reinstate it (but hopefully with proper test coverage).

https://github.com/llvm/llvm-project/pull/87644