[Microsoft.Identity.Web] All Add... methods should propose an override with Action<MicrosoftIdentityOptions>

[jmprieur]

Why?
Today all Microsoft.Identity.Web public API named Add.XXX propose an override with a config file section name. Some to propose an override with an Action<>

What?
Ensure that both overrides exists, to let use plug-in their configuration the way they want

Context:
recommended by Chris Ross/ASP.NET Core

[jennyf19]

Now tracked in microsoft identity web repo: AzureAD/microsoft-identity-web#2