[Chapel Merge] Lower parallel/bundles/bundles problem size under

Branch: refs/heads/master
Revision: 02f27a4
Author: ronawho
Log Message:

Merge pull request #17364 from ronawho/lower-bundles-test-vgrnd

Lower parallel/bundles/bundles problem size under valgrind

This takes takes over 15 minutes under valgrind and occasionally times
out so lower the problem size. It should finish in under 5 seconds now.

Modified Files:
A test/parallel/bundles/bundles.execopts

Compare: https://github.com/chapel-lang/chapel/compare/78c0843fb2df...02f27a4572bf