[clang] [Clang][Parser] Add a warning to ambiguous uses of T...[N] types (PR #116332)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-aarch64-darwin` running on `doug-worker-4` while building `clang` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/190/builds/11288

<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 'lld :: MachO/arm64-thunk-starvation.s' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/llvm-mc -filetype=obj -triple=arm64-apple-darwin /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/lld/test/MachO/arm64-thunk-starvation.s -o /Users/buildbot/buildbot-root/aarch64-darwin/build/tools/lld/test/MachO/Output/arm64-thunk-starvation.s.tmp.o
+ /Users/buildbot/buildbot-root/aarch64-darwin/build/bin/llvm-mc -filetype=obj -triple=arm64-apple-darwin /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/lld/test/MachO/arm64-thunk-starvation.s -o /Users/buildbot/buildbot-root/aarch64-darwin/build/tools/lld/test/MachO/Output/arm64-thunk-starvation.s.tmp.o
error: No space left on device

--

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


```

</details>

https://github.com/llvm/llvm-project/pull/116332