Add a `linkerd jaeger uninstall` command which prints the linkerd-jaeger extension resources so that they can be deleted. This is similar to the `linkerd uninstall` command.
```
> bin/linkerd jaeger uninstall | k delete -f -
clusterrole.rbac.authorization.k8s.io "linkerd-jaeger-linkerd-jaeger-proxy-mutator" deleted
clusterrolebinding.rbac.authorization.k8s.io "linkerd-jaeger-linkerd-jaeger-proxy-mutator" deleted
mutatingwebhookconfiguration.admissionregistration.k8s.io "linkerd-proxy-mutator-webhook-config" deleted
namespace "linkerd-jaeger" deleted
```
Signed-off-by: Alex Leong <alex@buoyant.io>
Alex Leong