[clang] [llvm] [mlir] [Coroutines] Add llvm.coro.is_in_ramp and drop return value of llvm.coro.end (PR #153404)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-sie-ubuntu-fast` running on `sie-linux-worker` while building `clang,llvm,mlir` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/144/builds/33657

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

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: Instrumentation/HWAddressSanitizer/coro-byval-param.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt < /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/test/Instrumentation/HWAddressSanitizer/coro-byval-param.ll -passes='hwasan,coro-early' -S # RUN: at line 1
+ /home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt -passes=hwasan,coro-early -S
Intrinsic has incorrect return type!
ptr @llvm.coro.end
/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/bin/opt: -: error: input module is broken!

--

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


```

</details>

https://github.com/llvm/llvm-project/pull/153404