extract IDE service from server

[akosyakov]

Right now IDE configuration of the workspace is controlled by the server. IDE configuration is maintained by @gitpod-io/engineering-ide, though the deployment of the server is maintained by @gitpod-io/engineering-webapp. Instead we should move IDE configuration (code and configmap) to a new component which can be deployed by the IDE team and establish the interface between server and such service to resolve IDE configuration.

[akosyakov]

It came up again while working on JB dev loop optimization we had to change different APIs and code of ws-manager and server. We should rather encapsulate such logic in our component and generalize APIs & internals of ws-manager and server.

It will allow us more fine grain optimization without relying on other teams.

[jeanp413]

This week we need to do migration