Admin user cannot set dates in the past

[oskogstad]

Description

Admin users can't set dates in the past

• feat: Added support for Timefields to be in the past #3227
• Add support for DueAt in the past when SilentUpdate altinn-dialogporten-adapter#123

Reproduction

User with admin scope, attempt to create dialog with DueAt or ExpiresAt in the past

Expected behavior

200 OK

Actual behavior

422 Unprocessable Content , dates must be in the past