LinkedIn social login provider not v2 capable

The current implementation of the OpenOlat inkedIn login provider does not work anymore. LinkedIn moved everything to v2 while OpenOlat still supports v1. 

• r_basicprofile not supported anymore, use r_liteprofile instead
• https://api.linkedin.com/v1/people/~:(id,first-name,last-name,email-address)
  not supported anmore, use
  https://api.linkedin.com/v2/shares/1234?projection=(id,owner~(localizedFirstName,localizedLastName))

• Move to v2 namespace 

For more info see here:

https://docs.microsoft.com/de-ch/linkedin/shared/api-guide/concepts/urns?context=linkedin/context