Add support for Config Connector Resources to overwrite alternative fields (vs. 'image:') if needed

Currently ConfigConnector resources only have images under the `image:` tag overridden. There are some resources though:
ex - `BuildStep`
https://cloud.google.com/build/docs/api/reference/rest/v1/projects.builds#Build.BuildStep

That have a `name:` field which takes an image which a user would likely want skaffold to overwrite