[llvm] TargetMachine: Remove pointer-size query methods (PR #226404)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `openmp-s390x-linux` running on `systemz-1` while building `llvm` at step 6 "test-openmp".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/88/builds/27530

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-openmp) failure: 1200 seconds without output running [b'ninja', b'-j 4', b'check-openmp'], attempting to kill
...
PASS: libomp :: worksharing/sections/omp_sections_nowait.c (453 of 464)
PASS: libomp :: worksharing/sections/omp_sections_reduction.c (454 of 464)
PASS: libomp :: worksharing/single/omp_single.c (455 of 464)
PASS: libomp :: worksharing/single/omp_single_copyprivate.c (456 of 464)
PASS: libomp :: worksharing/single/omp_single_nowait.c (457 of 464)
PASS: libomp :: worksharing/single/omp_single_private.c (458 of 464)
PASS: libomp :: worksharing/for/omp_for_collapse.c (459 of 464)
PASS: libomp :: worksharing/for/omp_for_collapse_LowerTriangularLess.c (460 of 464)
PASS: libomp :: worksharing/for/omp_collapse_many_GTGEGT_int.c (461 of 464)
PASS: libomp :: worksharing/for/omp_collapse_many_LTLEGE_int.c (462 of 464)
command timed out: 1200 seconds without output running [b'ninja', b'-j 4', b'check-openmp'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1461.811226

```

</details>

https://github.com/llvm/llvm-project/pull/226404