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

[Mark de Wever via cfe-commits]

================
@@ -21,6 +21,9 @@
 // GCC doesn't support the aligned-allocation flags.
 // XFAIL: gcc
 
+// TODO(mordante) fix this test after updating clang in Docker
+// UNSUPPORTED: clang-15, clang-16, clang-17, clang-18
----------------
mordante wrote:

I hope to start testing with clang-19 soon, that might be before this patch lands.
```suggestion
// UNSUPPORTED: clang-15, clang-16, clang-17, clang-18, clang-19
```

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