Add -d/--dev common command-line flag to put service in Dev Mode

[FelixTing]

🚀 Feature Request

Relevant Package [REQUIRED]

This feature request is for C Device SDK

Description [REQUIRED]

Currently with the new Common Config, the common Host settings, i.e MessageBus.Host, etc., are in common config in the Config Provider. When running from command line in hybrid mode with Config Provider, the common Host settings have been overridden with the docker network names and are not valid when running service outside docker.
The current workaround is to have these common Host settings commented out every services' local private configuration file. When running the service in hybrid mode with Config Provider, the developer must uncomment these settings.

ref:

• Add dev command line flag to apply "Host" env overrides when running in hybrid mode go-mod-bootstrap#509

Describe the solution you'd like

Add the new -d/--dev command flag which will cause all the Host settings pulled from common configuration to be overridden with the value localhost.

Refer to these PRs in Go:

• feat: Add -d/--dev common command-line flag to put service in Dev Mode go-mod-bootstrap#516
• fix: [WIP] Remove dev override of Service.Host so IP address can be used go-mod-bootstrap#541
• fix: Expand DevMode flag to set values for external access go-mod-bootstrap#601

Describe alternatives you've considered

Use current work around of commented out settings which clutter the service config files