feat: update identity data based on id token claims on each login

[splaunov]

When new identity is registered with OIDC, any attribute from ID Token can be saved into identity data fields like traits, metadata_public and metadata_admin.
But there is no way to change that data on user login. One common use case is to capture groups into metadata_admin on registration and then update list of groups on each next login.

This PR adds logic to update identity data based on ID Token content.

Related issue(s)

Checklist

• [ x] I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• [x ] I am following the
  contributing code guidelines.
• [ x] I have read the security policy.
• [ x] I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security vulnerability, I
  confirm that I got the approval (please contact
  security@ory.sh) from the maintainers to push
  the changes.
• [ x] I have added tests that prove my fix is effective or that my feature
  works.
• I have added or changed the documentation.

Further Comments

[luflow]

@splaunov Isn't this the same idea like #2428?

[splaunov]

I would not say it's the same.
#2428 updates the token but not traits and metadata.