Automatic merge from submit-queue (batch tested with PRs 42216, 42136, 42183, 42149, 36828)

Set custom threshold for memory eviction test

I am hoping this helps with memory eviction flakes, e.g. https://github.com/kubernetes/kubernetes/issues/32433 and https://github.com/kubernetes/kubernetes/issues/31676

/cc @derekwaynecarr @calebamiles @dchen1107