[libc] [llvm] [libc][stdlib] Implement heap sort. (PR #98582)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `openmp-offload-libc-amdgpu-runtime` running on `omp-vega20-1` while building `libc,utils` at step 10 "Add check check-offload".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/73/builds/1937

Here is the relevant piece of the build log for the reference:
```
Step 10 (Add check check-offload) failure: 1200 seconds without output running [b'ninja', b'-j 32', b'check-offload'], attempting to kill
...
PASS: libomptarget :: x86_64-pc-linux-gnu-LTO :: offloading/bug49779.cpp (776 of 786)
PASS: libomptarget :: x86_64-pc-linux-gnu-LTO :: offloading/test_libc.cpp (777 of 786)
PASS: libomptarget :: x86_64-pc-linux-gnu-LTO :: offloading/wtime.c (778 of 786)
PASS: libomptarget :: amdgcn-amd-amdhsa :: offloading/bug49021.cpp (779 of 786)
PASS: libomptarget :: amdgcn-amd-amdhsa :: offloading/parallel_target_teams_reduction_min.cpp (780 of 786)
PASS: libomptarget :: x86_64-pc-linux-gnu :: offloading/std_complex_arithmetic.cpp (781 of 786)
PASS: libomptarget :: x86_64-pc-linux-gnu :: offloading/bug49021.cpp (782 of 786)
PASS: libomptarget :: x86_64-pc-linux-gnu-LTO :: offloading/complex_reduction.cpp (783 of 786)
PASS: libomptarget :: x86_64-pc-linux-gnu-LTO :: offloading/std_complex_arithmetic.cpp (784 of 786)
PASS: libomptarget :: x86_64-pc-linux-gnu-LTO :: offloading/bug49021.cpp (785 of 786)
command timed out: 1200 seconds without output running [b'ninja', b'-j 32', b'check-offload'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1228.844356

```

https://github.com/llvm/llvm-project/pull/98582