[clang] [Sema] Add check for bitfield assignments to larger integral types (PR #68276)

[via cfe-commits]

vabridgers wrote:

> Hi! This commit broke some armv8/armv7 bots: https://lab.llvm.org/buildbot/#/builders/245/builds/15263 https://lab.llvm.org/buildbot/#/builders/187/builds/13069 Int & Void* have the same size there, so no warning on bitfield-width.c:20.

I'll revert this change for now then. 

https://github.com/llvm/llvm-project/pull/68276