[llvm] [fix test] Move typedefs-with-same-name.test into ARM folder (PR #167005)

[Roy Shi via llvm-commits]

royitaqi wrote:

It seems all tests passed in CI:
```
Linux x64 Test Results:
185999 tests passed
4813 tests skipped
```

Yet another seemingly irrelevant error prevented the job to finish green.
```
  Traceback (most recent call last):
    File "/home/gha/actions-runner/_work/llvm-project/llvm-project/.ci/premerge_advisor_explain.py", line 146, in <module>
      main(
    File "/home/gha/actions-runner/_work/llvm-project/llvm-project/.ci/premerge_advisor_explain.py", line 78, in main
      comment = get_comment(
                ^^^^^^^^^^^^
  TypeError: get_comment() missing 2 required positional arguments: 'pr_number' and 'body'
  Error: Process completed with exit code 1.
  ```

**I am going to merge this patch**, because:
1. I have verified this patch locally.
2. It seems to pass in CI (except for the above error).
3. We want the x86 buildbots to be green during Friday night and the weekend.


https://github.com/llvm/llvm-project/pull/167005