watches: increase upper bound for marketplace operator
watches: increase upper bound for marketplace operator

Around 8/20 we started seeing an increase in this test failing, and
looks connected to moving to client-go's leader election[1].

This increases the thershold +2 for each platform, which should cover
the higher values I've seen in CI.

[1] https://github.com/operator-framework/operator-marketplace/commit/bdc627a565d29b4ed03e5f294d1f77b3c5526551

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