[Chapel Merge] Unset CHPL_LLVM_CONFIG variable for GPU tests

Branch: refs/heads/main
Revision: 41111de27df2517f2bc4b439c54a0c83adf29311
Author: riftEmber
Link: Unset CHPL_LLVM_CONFIG variable for GPU tests by riftEmber · Pull Request #25237 · chapel-lang/chapel · GitHub
Log Message:
Unset CHPL_LLVM_CONFIG variable for GPU tests (#25237)

Unset the CHPL_LLVM_CONFIG environment variable for GPU tests.

This variable is set by the new Spack install, and prevents the test
scripts from overriding with another LLVM such as ROCM LLVM when
necessary. Unsetting it is a temporary solution; it should be possible
to change the Spack install to never set it in the first place in all
configurations, but we want to minimize potential fallout leading up to
release.

See discussion at
Sign in to Hewlett Packard Enterprise | Slack.

[reviewed by @jabraham17 , thanks!]

Compare: Comparing 441a3580309576d46cd53bb7562bd46209fa475a...9a8f130d34b75581ed3c6528d6d872b90005e7ca · chapel-lang/chapel · GitHub

Diff:
M util/cron/test-gpu-rocm.bash
M util/cron/test-gpu-rocm.gasnet.bash
M util/cron/test-perf.gpu-rocm.bash
https://github.com/chapel-lang/chapel/pull/25237.diff