* ui: Add forking based on service instance id existence
Proxies come in 2 flavours, 'normal' and sidecar. We know when a proxy
is a sidecar proxy based on whether a DestinationServiceID is set.
LocalServiceAddress and LocalServicePort are only relevant for sidecar
proxies.
This adds template logic to show different text depending on this
information.
Additionally adds test around connect proxies (#5418)
1. Adds page object for the instance detail page
2. Adds further scenario steps used in the tests
3. Adds acceptance testing around the instance detail page. Services
with proxies and the sidecar proxies and proxies themselves
4. Adds datacenter column for upstreams
5. Fixes bug routing bug for decision as to whether to request proxy
information or not
