Bug: Healthy Providers Aren't Rechecked When Reapplied

[epps]

Description

Currently, if healthy providers are re-applied, their health checks are run again; however, this is undesirable behavior. This PR introduces changes that ensure that applied providers have health checks only if:

• they are being created for the first time
• they already existed but have different configs
• they already existed but previously failed their health checks

Type of change

Select type(s) of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have fixed any merge conflicts