[Chapel Merge] Fix concurrent-alloc test for nodes with more than

Branch: refs/heads/main
Revision: 56bb3bd
Author: ronawho
Log Message:

Merge pull request #18221 from ronawho/fix-concurrent-alloc-test

Fix concurrent-alloc test for nodes with more than 127 cores

This test stores the taskid into int(8) arrays and that overflowed with
128-core systems. Adjust the test to do taskid % max(int(8)).

Modified Files:
M test/runtime/configMatters/mem/concurrent-alloc.chpl

Compare: https://github.com/chapel-lang/chapel/compare/c28d2b680f20...56bb3bd8785c