scaletest: Align kops scalability configuration with kube-up for kubelet maxPods

[ronaldngounou]

Align kops scalability configuration with kube-up by setting spec.kubelet.maxPods=110 to match the kubernetes default values.

Contributes to #18070

[k8s-ci-robot]

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[ronaldngounou]

/test pull-kops-gce-master-scale-performance-100
/test pull-kops-ec2-master-scale-performance-100

[ronaldngounou]

Rebased

[k8s-ci-robot]

@ronaldngounou: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-kops-kubernetes-e2e-ubuntu-gce-build	8186f45	link	false	/test pull-kops-kubernetes-e2e-ubuntu-gce-build

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[hakman]

This change might have unintended consequences for AWS with VPC CNI, due to the number of pre-allocated IPs.
/cc @hakuna-matatah @dims