LinkedIn deprecated parts

[zbabayee]

Some parts of codes for linkedin oauth2 is deprecated .
these parts are:
LinkedInOAuth2Adapter views:
profile_url "https://api.linkedin.com/v2/me" changed to "https://api.linkedin.com/v2/userinfo"

LinkedInOAuth2Provider providers:
default scopes : 'r_liteprofile, r_fullprofile, r_basicprofile,...' changed to 'openid, profile and email'
profile fileds : 'id, firstName, lastName' changed to 'sub, name, given_name, family_name, picture, email, email_verified'
function 'extract_uid' also should be change because there is no fied 'id' in linkedin response, it changed to 'sub'.

[pennersr]

The changes described turn LinkedIn from an OAuth2 provider into a regular OIDC provider. I think we need to look into deprecating the linkedin_oauth2 provider in favor of just using the openid_connect provider.

Related: #3391

[zbabayee]

yes, you're right.
thanks