[Feat]: Add ID token introspection for generic Oauth

[lanedsmu]

Curerntly the generic Oauth provider interrogates the OIDC access token and will potentially query the userinfo endpoint for additional information. We'd like to be able to access data from the ID token as well.

Describe the solution you'd like
If there were a way--via json path or otherwise--to reference attributes from the ID token, that would improve the authentication process and possibilities significantly. The ID token--like the access token--is a standard in OIDC.

[dragonpoo]

Lowcoder backend is already using ID token for mapping user info.
In frontend, please introduce a new mapping called "jwt" so that it refers to ID token field name.
@FalkWolsky @raheeliftikhar5 @Imiss-U1025