Removed IUserFactory in favor of ISentryUserFactory

[bitsandfoxes]

If I got that right:
Sentry's ServiceCollectionExtension adds the HttpContextAccessor.

sentry-dotnet/src/Sentry.AspNetCore/Extensions/DependencyInjection/ServiceCollectionExtensions.cs

Line 25 in ad6968c

services.AddHttpContextAccessor();

That way the DefaultUserFactory is able to access the context and no longer requires it to be passed down.

Also resolves #2844

[jamescrosswell]

That way the DefaultUserFactory is able to access the context and no longer requires it to be passed down.

Exactly, yeah.

Might be worth checking if this is related, while we're making changes here:

• ISentryUserFactory doesn't work unless it also implements the obsolete IUserFactory interface #2844

[bitsandfoxes]

Might be worth checking if this is related, while we're making changes here:

Yes. It coincidentally fixes this issue.