[clang] [clang-tools-extra] [libcxx] Reland "[clang] Enable sized deallocation by default in C++14 onwards" (PR #90373)

[Vitaly Buka via cfe-commits]

vitalybuka wrote:

This one is broken https://lab.llvm.org/buildbot/#/builders/168/builds/20461

https://github.com/llvm/llvm-project/pull/90373