Give each kops-controller controller unique names

[rifelpet]

This makes progress on fixing ipv6 support.

For IPV6 clusters we enable an ipam controller in kops-controller:

kops/pkg/apis/kops/cluster.go

Lines 949 to 951 in 423b640

	func (c *ClusterSpec) IsKopsControllerIPAM() bool {
	return c.IsIPv6Only()
	}

kops/upup/pkg/fi/cloudup/template_functions.go

Lines 774 to 776 in 423b640

	if cluster.Spec.IsKopsControllerIPAM() {
	config.EnableCloudIPAM = true
	}

kops/cmd/kops-controller/main.go

Lines 221 to 227 in 423b640

	if opt.EnableCloudIPAM {
	if err := setupCloudIPAM(ctx, mgr, &opt); err != nil {
	setupLog.Error(err, "unable to setup cloud IPAM")
	os.Exit(1)
	}
	}

controller-runtime's manager picks "names" for each controller it manages, and defaults to the kind it watches:

https://github.com/kubernetes-sigs/controller-runtime/blob/38546806f2faf5973e3321a7bd5bb3afdbb5767d/pkg/builder/controller.go#L247-L257

This means that alongside the node bootstrap controller, there are multiple controllers watching nodes. This results in a conflict which causes kops-controller to crash loop:

I0906 00:17:26.074975       1 main.go:373] "msg"="enabling IPAM controller" "logger"="setup"
I0906 00:17:26.075026       1 awsipam.go:47] Starting aws ipam controller
E0906 00:17:26.077961       1 main.go:230] "msg"="unable to create controller" "error"="controller with name node already exists. Controller names must be unique to avoid multiple controllers reporting to the same metric" "controller"="NodeController" "logger"="setup"

This PR gives each controller a unique name to avoid the conflict.

[justinsb]

/approve
/lgtm

(We discussed in office hours, this uniqueness requirement was introduced in kubernetes-sigs/controller-runtime@2b94165 )

[k8s-ci-robot]

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