Social signup users from google and github must be taken to Onboarding flow

[SathyaJayabal]

Social signup users from google and github must be taken to Onboarding flow

[lakshmiathreya]

In order to resolve the Topgear access issues, Onboarding was reverted for Topgear and Social signups ... Need to re-implement Onboarding for Social now ... cc @Oanh-and-only-Oanh @rmitchell-iii

[lakshmiathreya]

#5977