[clang] [clang][bytecode] Implement __builtin_{memchr,strchr,char_memchr} (PR #130420)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-win-x-aarch64` running on `as-builder-2` while building `clang` at step 9 "test-check-llvm".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/193/builds/6155

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

```
Step 9 (test-check-llvm) failure: Test just built components: check-llvm completed (failure)
******************** TEST 'LLVM-Unit :: Support/./SupportTests.exe/51/87' FAILED ********************
Script(shard):
--
GTEST_OUTPUT=json:C:\buildbot\as-builder-2\x-aarch64\build\unittests\Support\.\SupportTests.exe-LLVM-Unit-10400-51-87.json GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=87 GTEST_SHARD_INDEX=51 C:\buildbot\as-builder-2\x-aarch64\build\unittests\Support\.\SupportTests.exe
--

Script:
--
C:\buildbot\as-builder-2\x-aarch64\build\unittests\Support\.\SupportTests.exe --gtest_filter=Caching.NoCommit
--
C:\buildbot\as-builder-2\x-aarch64\llvm-project\llvm\unittests\Support\Caching.cpp(142): error: Value of: AddStream
  Actual: false
Expected: true


C:\buildbot\as-builder-2\x-aarch64\llvm-project\llvm\unittests\Support\Caching.cpp:142
Value of: AddStream
  Actual: false
Expected: true



********************


```

</details>

https://github.com/llvm/llvm-project/pull/130420