[llvm] [NFC] Refactor the SelectionDAG::getMemcmp etc with a existing helper function getRuntimeCallSDValueHelper (PR #184200)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `libc-x86_64-debian-dbg-bootstrap-build` running on `libc-x86_64-debian` while building `llvm` at step 2 "update-annotated-scripts".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/200/builds/26314

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

```
Step 2 (update-annotated-scripts) failure: update (failure)
git version 2.39.5
remote: Internal Server Error
fatal: unable to access 'https://github.com/llvm/llvm-zorg.git/': The requested URL returned error: 500
remote: Internal Server Error
fatal: unable to access 'https://github.com/llvm/llvm-zorg.git/': The requested URL returned error: 500

```

</details>

https://github.com/llvm/llvm-project/pull/184200