[Chapel Merge] Use llvm 11 for Arkouda release testing

Branch: refs/heads/main
Revision: f888bb3
Author: ronawho
Link: Use llvm 11 for Arkouda release testing by ronawho · Pull Request #19433 · chapel-lang/chapel · GitHub
Log Message:

Merge pull request #19433 from ronawho/ak-xc-release-llvm-11

Use llvm 11 for Arkouda release testing

Default nightly version is 13, but we can't use that for release testing
until we upgrade to 1.26

Modified Files:
M util/cron/common-arkouda.bash

Compare: https://github.com/chapel-lang/chapel/compare/5a3f0a5f2d90...f888bb334a04