[SRVKS-452] Bump webhook memory limit to 1G.

[markusthoemmes]

The linked JIRA has all the context. Unfortunately our webhook currently scales fairly linearly with namespaces so this would in theory allow ~1000 namespaces which sounds sufficient to me for the time being.

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[matzew]

@aliok can you apply the same change to eventing-operator

[jcrossley3]

I don't approve of this "fix". The right way to address this is in the CR itself, set by our knative-openshift operator, using this mechanism: knative#362

[markusthoemmes]

@jcrossley3 I agree, when the fix was done this hasn't been merged yet. The resources override is also not in the 0.13 version. Please feel free to backport that into 0.13 and make the necessary changes in the serverless-operator.