test/e2e/upgrade/alert: Temporarily allow ExtremelyHighIndividualControlPlaneCPU
test/e2e/upgrade/alert: Temporarily allow ExtremelyHighIndividualControlPlaneCPU

I'd added an exception for the wrong alert in d60209c73f
(test/e2e/upgrade/alert: Temporarily allow HighOverallControlPlaneCPU,
2021-07-19, #26341).  This commit pivots the exception to cover the
alert that is actually firing in CI.

JacobTanenbaum/origin,mahak/origin,soltysh/origin,hroyrh/origin,mahak/origin,jsafrane/origin,akram/origin,bparees/origin,JacobTanenbaum/origin,csrwng/origin,sallyom/origin,mahak/origin,openshift/origin,akram/origin,hroyrh/origin,bparees/origin,hroyrh/origin,jsafrane/origin,mfojtik/origin,jsafrane/origin,akram/origin,soltysh/origin,deads2k/origin,gabemontero/origin,sallyom/origin,gabemontero/origin,deads2k/origin,bparees/origin,soltysh/origin,deads2k/origin,mfojtik/origin,mfojtik/origin,gabemontero/origin,sallyom/origin,JacobTanenbaum/origin,csrwng/origin,openshift/origin,csrwng/origin,openshift/origin