[Chapel Merge] Disable llvm for linux32 and asan testing

Branch: refs/heads/master
Revision: 7ae66c7
Author: ronawho
Log Message:

Merge pull request #17654 from ronawho/disable-llvm-32-bit-and-asan

Disable llvm for linux32 and asan testing

[reviewed by @daviditen]

llvm does not currently support 32-bit platforms so don't use it there.
We also don't support asan for llvm, because we currently rely on the
backend C compiler to add sanitizing for us and that's not something
we've wired through llvm.

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

M util/cron/test-linux32.bash

Compare: https://github.com/chapel-lang/chapel/compare/bd24013fd605...7ae66c74c104