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

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• 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.
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• I have added tests that prove my fix is effective or that my feature works.
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