The initial idea was to keep it separate since the unattached
links were also to be displayed distinctively from the metrics.
With the new design, unattached links are rendered in the same
list as metrics with attached links.
Therefore, we treat unattached metric links as an empty metric.
scope-app:
- Adds `-app.metrics-graph` cli flag for configuring the base url to
use for graph links; supports `:orgID` and `:query` placeholders
- Renders `metric_links` in node detail API response
scope-ui:
- Extends `<CloudFeature />` with option `alwaysShow` and adds
boolean `isCloud` property
- Links metric graphs in the ui's node details view for all k8s
toplogies; or displays placeholder graph if no metrics available
