Cluster-api-provider-aws: Instances should be tagged with their Machine name

[benmoss]

/kind feature

Describe the solution you'd like
Right now VMs in AWS are named for their AWSMachine object, which has a different name than the corresponding Machine object. It would be really useful if at least there was a tag on the VM with the Machine name so that it I don't have to do an extra lookup to find which Machine it corresponds to.

[detiber]

One caveat here, we already have quite a few tags that would conflict across namespaces, it might be good to make sure that if/when we introduce any new ones that they include the namespace in addition to the name to avoid potential conflicts from the same management cluster (not sure we should try to solve issues related to separate management clusters conflicting on naming).

[detiber]

/priority important-longterm
/milestone Next

[benmoss]

I agree, something like the Kubernetes NamespacedName could be used

[shysank]

/assign