Feature: Require explicit version constraints for providers

[Despire]

Description

Currently claudie does not enforce explicit version constraints on defined providers, defaulting always to the latest version. This restricts us on how we can rollout template updates.

Claudie should enforce explicit version constraints in providers, and no latest should be supported. Having support for latest means that cluster would have to perform a rolling update whenever new changes are pushed. The timing for this will never be ideal for anyone, therefore I suggest explicit version constraints, and leave this to the users to determine when it is a good time to migrate to new templates

Exit criteria

• [ ] Drop latest for provider and require explicit version constraints