Moves healthcheck report-related structs from coderd/healthcheck to codersdk
This prevents an import cycle when adding a codersdk.Client method to hit /api/v2/debug/health.
Part of #10676
- Adds a health section for provisioner daemons (mostly cannibalized from the Workspace Proxy section)
- Adds a corresponding storybook entry for provisioner daemons health section
- Fixed an issue where dismissing the provisioner daemons warnings would result in a 500 error
- Adds provisioner daemon error codes to docs