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

[Pengcheng Wang via cfe-commits]

wangpc-pp wrote:

> > Based on my rough understanding, this is expected?
> 
> What do you mean?
> 
> Isn't this test needs to be updated or disabled?

I think this ASAN failure is not caused by this PR because these memorys are allocated/deallocated by `memory_resource` directly, **there is nothing about `new`/`delete`**. We allocate 50 bytes via `void* ret = r1.allocate(50);` and deallocate 1 byte via `r1.deallocate(ret, 1);` and that's the reason why ASAN failed, because the size of the allocated type (50 bytes) and the size of the deallocated type (1 byte) are really not matched.

I don't know if this is what we want to test, if so, we may add `// UNSUPPORTED: asan` to skip this test in ASAN builds.
cc @ldionne @Quuxplusone

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