Move tunnel functionality into into Sentry.AspNetCore

[SimonCropp]

• Copies SentryTunnelMiddleware into Sentry.AspNetCore
• Adds a nuget dependency from Sentry.Tunnel to Sentry.AspNetCore
• Stubs out the old Sentry.Tunnel.SentryTunnelMiddleware by inheriting from Sentry.AspNetCore.SentryTunnelMiddleware
• Obsoletes Sentry.Tunnel.SentryTunnelMiddleware
• Merges Sentry.Tunnel.Tests into Sentry.AspNetCore.Tests
• Removes [Collection("SentryTunnelCollection")] from IntegrationsTests
• Copies extension methods from SentryTunnelingApplicationBuilderExtensions into SentryWebHostBuilderExtensions
• Redirects method in SentryTunnelingApplicationBuilderExtensions to SentryWebHostBuilderExtensions
• Obsoletes SentryTunnelingApplicationBuilderExtensions and points to SentryWebHostBuilderExtensions
• Obsolete Sentry.Tunnel on nuget.

fixes #1141

[SimonCropp]

Questions

• @bruno-garcia what did [Collection("SentryTunnelCollection")] do?
• If we want the tunnel host build API, i will need help. I failed to reverse engineer that code
• Why is SentryTunnelMiddleware public?
• @mattjohnsonpint i thought you already updated the docs related to tunneling?

[mattjohnsonpint]

• @mattjohnsonpint i thought you already updated the docs related to tunneling?

nope

[bruno-garcia]

We can add the NuGet package obsolete on the gallery once we ship this.

[SimonCropp]

@mattjohnsonpint @bruno-garcia one complexity of this is for people using Sentry.AspNet (non core). shouldnt they using tunnel as well?

[mattjohnsonpint]

Tunneling is useful, but completely optional. We didn't have a ASP.NET (non-core) tunnel before, so it's not an issue at the moment. If it becomes higher priority, we could consider adding one to Sentry.AspNet later.