[clang] [clang] Check constexpr int->enum conversions consistently. (PR #143034)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

That pattern look like basically the same thing as the neg_one_constexpr testcase I added.  The diagnostic is expected.

Posted #144407 to add a relnote.

https://github.com/llvm/llvm-project/pull/143034