Automated cherry pick of #3185: cluster-autoscaler: use generated instance types #3222: Fix AWS CA tests for InstanceType generation changes

[gjtempleton]

Cherry pick of #3185 #3222 on cluster-autoscaler-release-1.16.

#3185: cluster-autoscaler: use generated instance types
#3222: Fix AWS CA tests for InstanceType generation changes

For details on the cherry pick process, see the cherry pick requests page.

[Jeffwan]

/lgtm
/approve

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[MaciekPytel]

@gjtempleton @Jeffwan This seems to breaking tests on 1.16, blocking a planned patch release. Can you take a look and either fix or rollback this change?

The errors look like this:

# k8s.io/autoscaler/cluster-autoscaler/cloudprovider/aws [k8s.io/autoscaler/cluster-autoscaler/cloudprovider/aws.test]
cloudprovider/aws/aws_manager_test.go:305:69: undefined: newLaunchConfigurationInstanceTypeCache
cloudprovider/aws/aws_manager_test.go:544:69: undefined: newLaunchConfigurationInstanceTypeCache

[gjtempleton]

Thanks for raising, raised #3365 to resolve this.