ims add a new OAuth2 Server-to-Server Request Interceptor

[francoisledroff]

Similar to our JWTAuthInterceptor we would need to implement a new Feign Request Interceptor to support
OAuth2 Server-to-Server Credentials , this would need to be baked in

• the ims lib
• the core lib within the workspace context holder
• the various service using the JWTAuthInterceptor so they could also use OAuth2 Server-to-Server Credentials when they are configured in the workspace