[Health Check] Added default Endpoint HTTP Health Check

[MaxDac]

Summary

Provides an alternative implementation to the HealthChecksBuilderExtensions.AddHttpEndpointCheck extension method previously used to quickly define a HTTP Health Check specifying directly the endpoint relative URI.

The new implementation leverages in a similar way as the previous one the creation of a customized HealthCheckParameters subclass to dynamically inject in the Health Check class the required information to build the HttpRequestMessage instance to perform the HTTP call.

For documentation, please refer to the updated markdown file.