Opentelemetry-dotnet: Proposal: introduce a nuget meta package

[longility]

One thought I have had in this area...

There's a lot of packages under the OT umbrella. To get up and running in an aspnetcore project most people are probably going to need OpenTelemetry.Collector.AspNetCore, OpenTelemetry.Collector.Dependencies, OpenTelemetry.Hosting, and then their exporter of choice.

It might be nice to have a meta package that combines OpenTelemetry.Collector.AspNetCore, OpenTelemetry.Collector.Dependencies, & OpenTelemetry.Hosting into something like OpenTelemetry.AspNetCore? Basically so you only have to consume 2: the meta & your exporter. I think it would help resolve the naming weirdness because people wouldn't need to care, just grab the meta package and off you go.

How's that for controversy :)

_Originally posted by @CodeBlanch in https://github.com/open-telemetry/opentelemetry-dotnet/pull/623#issuecomment-617895745_

I'm trying to gather additional buy-in, opinions and thoughts. I believe @cijothomas and @CodeBlanch are on board with this current proposal:

Motivation

There is a common set of nuget packages (OpenTelemetry.Adapter.AspNetCore, OpenTelemetry.Adapter.Dependencies, and OpenTelemetry.Hosting) that are needed for a common way of consuming (for an AspNetCore project). We are currently burdening the user who is building an AspNetCore project to need to know the different packages.

Proposal

A nuget meta-package OpenTelemetry.AspNetCore with the following nuget packages as dependencies:

• OpenTelemetry.Adapter.AspNetCore
• OpenTelemetry.Adapter.Dependencies
• OpenTelemetry.Hosting

Exporters continue to stay separate as it is not common.

[cijothomas]

Adding to the list:

OpenTelemetry.AspNet with the following nuget packages as dependencies:
OpenTelemetry.Adapter.AspNet.Win
OpenTelemetry.Adapter.Dependencies

OpenTelemetry.Worker (https://docs.microsoft.com/en-us/aspnet/core/fundamentals/host/hosted-services?view=aspnetcore-3.1&tabs=visual-studio#worker-service-template) with the following nuget packages as dependencies:
OpenTelemetry.Adapter.Dependencies
OpenTelemetry.Hosting