Adding render trigger in Control API

[tejal29]

As we are looking into integrating Skffold v2 with IDE,

Lets explore the gaps in control api. This API is used by IDEs to stop and star watching build and deploy dependencies.

The triggers, build & deploy will translate to build and render

/cc @aaron-prindle and @ericzzzzzzz who will be looking into CC skaffold V2 integration