[Chapel Merge] Fix junit parsing for `chpl-parallel-dbg/sub_test`

Branch: refs/heads/main
Revision: 4c4338b832fb6bb6b0e1c5d8742663ac61b07799
Author: jabraham17
Link: Fix junit parsing for `chpl-parallel-dbg/sub_test` by jabraham17 · Pull Request #28170 · chapel-lang/chapel · GitHub
Log Message:
Fix junit parsing for chpl-parallel-dbg/sub_test (#28170)

Fixes the output of chpl-parallel-dbg to match what our junit parser
expects

[Reviewed by @benharsh]

Compare: Comparing 42d4ae6c92a2fd174dbf37857c407e19b37c1cd0...d98f630c5002f97a7588fae87bcb5a29a4b2c020 · chapel-lang/chapel · GitHub

Diff:
M test/llvm/debugInfo/chpl-parallel-dbg/sub_test
https://github.com/chapel-lang/chapel/pull/28170.diff