feat(op): allow returning of parent errors to client

[muhlemmer]

This change introduces the possibility to return parent errors to clients. This is implemented by an optional flag on the *oidc.Error.

Currently it only support setting the parent inside JSON responses, not redirect URLs. As Go errors don't unmarshall well, only the marshaller is implemented for the moment.

Related to https://github.com/zitadel/zitadel/issues/8362

Definition of Ready

• [x] I am happy with the code
• [x] Short description of the feature/issue is added in the pr description
• [x] PR is linked to the corresponding user story
• [x] Acceptance criteria are met
• [x] All open todos and follow ups are defined in a new ticket and justified
• [x] Deviations from the acceptance criteria and design are agreed with the PO and documented.
• [x] No debug or dead code
• [x] My code has no repetitions
• [x] Critical parts are tested automatically
• [x] Where possible E2E tests are implemented
• [x] Documentation/examples are up-to-date
• [x] All non-functional requirements are met
• [x] Functionality of the acceptance criteria is checked manually on the dev system.

[github-actions[bot]]

:tada: This PR is included in version 3.27.0 :tada:

The release is available on GitHub release

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