[llvm] [ctx_prof] Insert the ctx prof flattener after the module inliner (PR #107499)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-sie-win` running on `sie-win-worker` while building `llvm` at step 7 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/46/builds/4653

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

```
Step 7 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: Other/opt-hot-cold-split.ll' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
z:\b\llvm-clang-x86_64-sie-win\build\bin\opt.exe -mtriple=x86_64-- -hot-cold-split=true -passes='default<Os>' -debug-pass-manager < Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\Other\opt-hot-cold-split.ll -o /dev/null 2>&1 | z:\b\llvm-clang-x86_64-sie-win\build\bin\filecheck.exe Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\Other\opt-hot-cold-split.ll -check-prefix=DEFAULT-Os
# executed command: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\opt.exe' -mtriple=x86_64-- -hot-cold-split=true '-passes=default<Os>' -debug-pass-manager -o /dev/null
# executed command: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\filecheck.exe' 'Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\Other\opt-hot-cold-split.ll' -check-prefix=DEFAULT-Os
# RUN: at line 2
z:\b\llvm-clang-x86_64-sie-win\build\bin\opt.exe -mtriple=x86_64-- -hot-cold-split=true -passes='lto-pre-link<Os>' -debug-pass-manager < Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\Other\opt-hot-cold-split.ll -o /dev/null 2>&1 | z:\b\llvm-clang-x86_64-sie-win\build\bin\filecheck.exe Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\Other\opt-hot-cold-split.ll -check-prefix=LTO-PRELINK-Os
# executed command: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\opt.exe' -mtriple=x86_64-- -hot-cold-split=true '-passes=lto-pre-link<Os>' -debug-pass-manager -o /dev/null
# executed command: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\filecheck.exe' 'Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\Other\opt-hot-cold-split.ll' -check-prefix=LTO-PRELINK-Os
# RUN: at line 3
z:\b\llvm-clang-x86_64-sie-win\build\bin\opt.exe -mtriple=x86_64-- -hot-cold-split=true -passes='thinlto-pre-link<Os>' -debug-pass-manager < Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\Other\opt-hot-cold-split.ll -o /dev/null 2>&1 | z:\b\llvm-clang-x86_64-sie-win\build\bin\filecheck.exe Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\Other\opt-hot-cold-split.ll -check-prefix=THINLTO-PRELINK-Os
# executed command: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\opt.exe' -mtriple=x86_64-- -hot-cold-split=true '-passes=thinlto-pre-link<Os>' -debug-pass-manager -o /dev/null
# executed command: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\filecheck.exe' 'Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\Other\opt-hot-cold-split.ll' -check-prefix=THINLTO-PRELINK-Os
# RUN: at line 4
z:\b\llvm-clang-x86_64-sie-win\build\bin\opt.exe -mtriple=x86_64-- -hot-cold-split=true -passes='lto<Os>' -debug-pass-manager < Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\Other\opt-hot-cold-split.ll -o /dev/null 2>&1 | z:\b\llvm-clang-x86_64-sie-win\build\bin\filecheck.exe Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\Other\opt-hot-cold-split.ll -check-prefix=LTO-POSTLINK-Os
# executed command: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\opt.exe' -mtriple=x86_64-- -hot-cold-split=true '-passes=lto<Os>' -debug-pass-manager -o /dev/null
# executed command: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\filecheck.exe' 'Z:\b\llvm-clang-x86_64-sie-win\llvm-project\llvm\test\Other\opt-hot-cold-split.ll' -check-prefix=LTO-POSTLINK-Os
# RUN: at line 5
z:\b\llvm-clang-x86_64-sie-win\build\bin\opt.exe -mtriple=x86_64-- -hot-cold-split=true -LINK-Os
# executed command: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\opt.exe' -mtriple=x86_64-- -hot-cold-split=true -LINK-Os
# .---command stderr------------
# | opt.exe: Unknown command line argument '-LINK-Os'.  Try: 'z:\b\llvm-clang-x86_64-sie-win\build\bin\opt.exe --help'
# | opt.exe: Did you mean '--Os'?
# `-----------------------------
# error: command failed with exit status: 1

--

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


```

</details>

https://github.com/llvm/llvm-project/pull/107499