[OPENAPI to CADL] Parse x-ms-parameterized-host and security defintions

[tjprescott]

x-ms-parameterized-host maps to the @server decorator
https://microsoft.github.io/typespec/standard-library/rest/overview#server

security definitions can be mapped to elements for the authentication library
https://microsoft.github.io/typespec/standard-library/rest/authentication

[stunney]

@tjprescott both links you provided are 404s

[tjprescott]

Well, so much for redirects. We renamed the repos, so the URLs no longer worked. They are updated now.