Reduce orchestratord deps

[alex-hunt-materialize]

Reduces orchestratord dependencies.

• Makes workspace-hack optional in many crates.
• Disables unused optional features of many orchestratord deps.
• Moves the DeploymentStatus enum from environmentd to orchestratord (inverts this dependency).
• Moves the CloudProvider enum to its own crate, so we don't need mz-sql any more.

Motivation

• This PR refactors existing code.

Makes orchestratord easier to import and use from the cloud repo. We have conflicts with many dependencies in the materialize repo, so the fewer there are, the better.

Tips for reviewer

Checklist

• This PR has adequate test coverage / QA involvement has been duly considered. (trigger-ci for additional test/nightly runs)
• This PR has an associated up-to-date design doc, is a design doc (template), or is sufficiently small to not require a design.
• If this PR evolves an existing $T ⇔ Proto$T mapping (possibly in a backwards-incompatible way), then it is tagged with a T-proto label.
• If this PR will require changes to cloud orchestration or tests, there is a companion cloud PR to account for those changes that is tagged with the release-blocker label (example).
• If this PR includes major user-facing behavior changes, I have pinged the relevant PM to schedule a changelog post.