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

[Derek Schuff via cfe-commits]

dschuff wrote:

We are also seeing the Windows failure. Given that there appear to be 2 separate problems, this patch should probably be reverted rather than trying to fix-forward.

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