Investigate usage of the different CommandResolvers

### Is your feature request related to a problem? Please describe.
Command resolution for non-built-in commands goes through a complex resolution process: https://github.com/dotnet/sdk/blob/a042aeea7cb68f159fd31e446c7794d3d987c36c/src/Cli/dotnet/CommandFactory/CommandResolution/DefaultCommandResolverPolicy.cs#L48-L60

There are a number of resolvers that could apply to a specific command here, and we have no idea which of these are still in use (though we have suspicions). We should do research and/or add telemetry to help us understand which of these modes are in use (and which can be removed).

### Describe the solution you'd like

I'd like to know more about which of these resolvers are used in practice by .NET authors - this would include data about:
* the name of the command being resolved
* the name of the resolver that resolved the command