Add organization_id to OAuth tables

What does this MR do and why?

It adds a new column organization_id to the oauth_access_grants, oauth_access_tokens, and oauth_openid_requests tables, and creates the necessary foreign key constraints. It also updates the code to use the new organization_id column where appropriate.

Fixes: #495492 (closed)

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This merge request introduces support for organizations in the OAuth2 access management system.