resolve failing tests in nightly cray ex perf job by updating max heap size #26069
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See (https://github.com/Cray/chapel-private/issues/6710). We have several tests in our
hpe-cray-ex-performance-test-perf.hpe-cray-ex.ofi
job failing because they're running out of memory. This PR updatesCHPL_RT_MAX_HEAP_SIZE
to 50%.This is what we have it set to in
./common-hpe-cray-ex.bash
so this seems like it should be fine to do.I haven't manually verified that this resolves all the failing tests, but given that we've had these failures going for a while (and I'm on triage) I don't mind pushing this out as an experimental update and dealing with any fallout that occurs tomorrow.