Merge pull request #93252 from adtac/scheduler-perf

scheduler_perf: refactor to allow arbitrary workloads

test/utils/runners.go

@@ -931,7 +931,7 @@ type CountToStrategy struct {
 }
 
 type TestNodePreparer interface {
-	PrepareNodes() error
+	PrepareNodes(nextNodeIndex int) error
 	CleanupNodes() error
 }