[Chapel Merge] Revert PRs 17930 and 17926

Branch: refs/heads/master
Revision: 3678ed7
Author: bradcray
Log Message:

Merge pull request #17940 from bradcray/revert-whitebox-llvm-take3

Revert PRs 17930 and 17926

[trivial, not reviewed]

This reverts PRs #17926 and #17930 which have been breaking smoke testing all day.

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

Compare: https://github.com/chapel-lang/chapel/compare/755ddc816d62...3678ed7ab412