[clang] [clang-tools-extra] [libcxx] [clang] Enable sized deallocation by default in C++14 onwards (PR #83774)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

> There is a Windows failure that I can't reproduce: https://buildkite.com/llvm-project/github-pull-requests/builds/46331 Can someone help me to figure out what is wrong?

I'm not certain what's going on yet, but it smells a bit like the interpreter needs to know about sized deallocations now being on by default (this may be exposing an existing bug rather than introducing a new one).

CC @vgvassilev

https://github.com/llvm/llvm-project/pull/83774