[C++14] Enable sized deallocation by default

[ChuanqiXu9]

Sized deallocation is a C++14 feature and it was disabled in clang due to potential ABI breaking (https://reviews.llvm.org/D8467). There was guys trying to enable it by default 2 years ago (https://reviews.llvm.org/D112921) but the work suspended later.

[llvmbot]

@llvm/issue-subscribers-c-14

[llvmbot]

@llvm/issue-subscribers-clang-driver

[Romain-Geissler-1A]

Hi @wangpc-pp,

Do you have any status on enabling this by default which you last tried this summer (https://reviews.llvm.org/D112921) ?

[shafik]

This feels like a duplicate of: #56505

We should try and keep one main bug and updates and queries should go to that.

[wangpc-pp]

Hi @wangpc-pp,

Do you have any status on enabling this by default which you last tried this summer (https://reviews.llvm.org/D112921) ?

There were some buildbot failures (Windows, AMDGPU) and I don't have such environments, so I suspended the progress.
I'm glad to have another try, but I need some help to fix these failures.

[vitalybuka]

Reverted with #90299