Move validation of HealthCheckServiceOptions to IValidationOptions<HealthCheckServiceOptions>

[weichch]

Is your feature request related to a problem? Please describe.

This isn't related to an issue. It is more of an improvement.

Currently the validation of HealthCheckServiceOptions happens in this private method. It'd be better if the code could be moved into an instance of IValidationOptions<HealthCheckServiceOptions>.

Describe the solution you'd like

Something like weichch#3

Additional context

It is also possible to use a dictionary to manage health check registrations if we could make registration name immutable #26572. Then validation becomes redundant.

Thanks for contacting us.
We're moving this issue to the Next sprint planning milestone for future evaluation / consideration. We will evaluate the request when we are planning the work for the next milestone. To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.