[FR] Add flag/config feature to allow users to get renderered manifest or some information about the resulting namespace of render + deploy config

[aaron-prindle]

Issues tracks adding flag/config feature to allow users get a renderered manifest or some information about the resulting namespace of render + deploy config.

Option 1 - (Skaffold) Render flag that populates the Namespace configured in deploy stanza
If there is a reason not to change the default behavior for render to support this, then a flag could be introduced on skaffold render to support it.

Option 2 - (Skaffold) Dry run
Introduce the ability to dry run skaffold apply where the output is the resources that would be applied to the cluster. Cloud Deploy could then inspect the dry run resource to extract the namespace that is being used at deploy time. Could be built on top of kubectl apply dry-run capability.