Upcoming BREAKING change: Introducing OIDC and dual environment support

[MariusStorhaug]

Description

Work on providing a unified approach for:

• [Feature Request] BREAKING change: Add options to split validation and publication resources #1085
• [Feature Request] BREAKING change: Authenticate to Azure from GH with OpenID Connect #1450

[MariusStorhaug]

@SeSeicht: Seems I cannot assign you to the issue, though you contributed to it.