The GO SDK, doesn't support the CLI's main usage paths

• Saving existing API Sessions to disc or secure storage for re-use
• Setting custom HTTP transports for tunnelling the REST APIs over a Ziti Overlay itself

To support thi,s the following will be added

• ApiSession interface (un)marshalling. ApiSessions can be of various flavors and must be (un)marshallable in a generic way
• In scenarios where the REST APIs are over an overlay, redirected OAuth RP servers pose an issue as redirects may not be possible; remove the shortcut and intercept inline instead
• Allow redirect URIs for OIDC to be overridden to match custom controller configurations