[llvm] [LLVM][rtsan] Add RealtimeSanitizer transform pass (PR #101232)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-ppc64le-rhel` running on `ppc64le-clang-rhel-test` while building `llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/145/builds/1104

Here is the relevant piece of the build log for the reference:
```
Step 5 (build-unified-tree) failure: build (failure)

```

https://github.com/llvm/llvm-project/pull/101232