[clang] [CIR] Upstream support for emitting constructors (PR #143639)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `flang-aarch64-out-of-tree` running on `linaro-flang-aarch64-out-of-tree` while building `clang` at step 9 "test-build-flang-unified-tree-check-flang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/53/builds/16839

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

```
Step 9 (test-build-flang-unified-tree-check-flang) failure: test (failure)
******************** TEST 'Flang :: Semantics/modfile76.F90' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/build_flang/bin/flang -fc1 -fsyntax-only -fhermetic-module-files -DSTEP=1 /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/llvm-project/flang/test/Semantics/modfile76.F90 # RUN: at line 1
+ /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/build_flang/bin/flang -fc1 -fsyntax-only -fhermetic-module-files -DSTEP=1 /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/llvm-project/flang/test/Semantics/modfile76.F90
/home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/build_flang/bin/flang -fc1 -fsyntax-only /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/llvm-project/flang/test/Semantics/modfile76.F90 # RUN: at line 2
+ /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/build_flang/bin/flang -fc1 -fsyntax-only /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/llvm-project/flang/test/Semantics/modfile76.F90
error: Semantic errors in /home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/llvm-project/flang/test/Semantics/modfile76.F90
/home/tcwg-buildbot/worker/flang-aarch64-out-of-tree/llvm-project/flang/test/Semantics/modfile76.F90:22:12: error: No explicit type declared for 'x'
    print *, x
             ^

--

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


```

</details>

https://github.com/llvm/llvm-project/pull/143639