EKS [request]: dynamic provisioning of instance store volume support in EKS

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**Tell us about your request**
What do you want us to build?
Provide support for Instance store volume in EKS

**Which service(s) is this request for?**
EKS

**Tell us about the problem you're trying to solve. What are you trying to do, and why is it hard?**
as per https://kubernetes.io/blog/2019/04/04/kubernetes-1.14-local-persistent-volumes-ga/ instance store volume is introduced but dynamic volume provisioning isn't supported

External controller can be used to dynamically provision the volume, ref: https://github.com/kubernetes-sigs/sig-storage-local-static-provisioner/blob/master/docs/getting-started.md#option-5-eks-experimental but this is experimental feature.

So there has to be a way in EKS to use instance store volume, it is very useful to use instance store for elasticsearch, mongodb kind of io hungry distributed applications running inside EKS.

**Are you currently working around this issue?**
How are you currently solving this problem?
I can't deploy elasticsearch or mongodb pods inside EKS because dynamic volume provisioning isnt available

**Additional context**
Anything else we should know?

**Attachments**
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Start with the Kubernetes 1.14 local persistent volumes announcement and the linked sig-storage local static provisioner documentation, focusing on the EKS experimental setup. Done means defining and delivering a supported way to dynamically provision instance store volumes for EKS workloads such as Elasticsearch or MongoDB.

Written by the indexing model from the issue text.