spk reconcile should remove rings from hld once they've been remove from a project

[mtarng]

As a:
spk user
I want:
my hld repository to be reconciled once i remove a ring from my project

Describe the solution you'd like:
when i remove a ring via spk ring delete, I expect the project lifecycle pipeline to:

• For each linked service in this project's bedrock.yaml, in the HLD repository:
  • Remove the ring from the service's component.yaml
  • Remove the ring directory from the service's directory.

Acceptance Criteria:

• As a user, if I remove a ring, then the changes are reflected in: the associated bedrock.yaml, my hld repository, and the materialized repository.
  • for every service in my application reppository, every service to have the removed ring… removed
  • p-1: delete just the ring directory for every service
  • p-unicorn: delete the configuration for the ring at every level it is referenced in the HLD
  • idea: copy all config content into memory, mapped by path, blow away existing HLD, re-generate new HLD based on bedrock.yaml, emit config content in memory to config files at path.
    • ¡idempotent!

Integration test should be handled by:
#974 and #1205

Additional context:
ring management epic: #955

Does this require updates to documentation?:
yes!

[mtarng]

@evanlouie @bnookala please check the acceptance criteria for this. Do we still need to save configs?

Current logic for spk hld reconcile is to blow everything away and regenerate every time?