Use pkg/cmd/cli/install/install.go/KubeletRootDir for IBM Cloud

[kaovilai]

oadp-operator/internal/controller/nodeagent.go

Lines 37 to 39 in b3e7f02

	IBMCloudPVHostPath = "/var/data/kubelet/pods"
	GenericPluginsHostPath = "/var/lib/kubelet/plugins"
	IBMCloudPluginsHostPath = "/var/data/kubelet/plugins"

vmware-tanzu/velero#9074