[CodeGen] Always expand division larger than i128

Default MaxDivRemBitWidthSupported to 128, so that divisions larger
than 128 bits are always expanded, without requiring additional
configuration from the target.

Note that this may still emit calls to __udivti3 on 32-bit targets,
which likely don't have an implementation of that builtin. However,
I believe this is sufficient to fix
https://github.com/llvm/llvm-project/issues/60531, because Zig must
already be defining those builtins.

Differential Revision: https://reviews.llvm.org/D144871