feat: store JWT claims in access request

[phooijenga]

Store the decoded JWT claims in the access request when performing an RFC 7523 request, so they can be inspected after validation.

Related Issue or Design Document

ory/hydra#3949

Checklist

• I have read the contributing guidelines and signed the CLA.
• I have referenced an issue containing the design document if my change introduces a new feature.
• I have read the security policy.
• 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 approval (please contact security@ory.sh) from the maintainers to push the changes.
• I have added tests that prove my fix is effective or that my feature works.
• I have added the necessary documentation within the code base (if appropriate).

Further comments

[mitar]

Please rebase from latest master branch to fix CI issues.

[mitar]

I am not completely sure you need this? I do ar.GetSession().(*OIDCSession).JWTClaims in my code (JWTClaims is where I store claims inside my OIDCSession implementation).

Example here and example here.