fix: consent and logout integration logic

[Benehiko]

Related Issue or Design Document

Further cleanup of the consent route. Added logic to the createHelpers function to inject consent skip logic.

Added the OAuth2 logout endpoint as well.

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

[jonas-jonas]

Code LGTM