[Chapel Merge] Set the performance playground script to test LLVM

Branch: refs/heads/main
Revision: 2d11123
Author: daviditen
Link: Set the performance playground script to test LLVM-14 by daviditen · Pull Request #19800 · chapel-lang/chapel · GitHub
Log Message:

Merge pull request #19800 from daviditen/llvm-14-perf-playground

Set the performance playground script to test LLVM-14

[reviewed by @ronawho]

Modified Files:
M util/cron/test-perf.chapcs.playground.bash

Compare: https://github.com/chapel-lang/chapel/compare/bad79ae132ff...2d11123427e6