Don't display "Initializing dotnet-scaffold" progress bar when waiting for user input after running dotnet scaffold the first time

When you first run `dotnet scaffold`, you get a telemetry notice that you need to acknowledge by pressing a key to continue. But you also then get an "Initializing dotnet-scaffold" progress bar, suggesting that the tooling is busy working on something. I've more than once sat around waiting for dotnet scaffold to finish initializing, only to later realize that I needed to press a key to continue :laugh:. We should wait to display the "Initializing dotnet-scaffold" progress bar until *after* the user has pressed a key to acknowledge the telemetry notice.

Repro steps:
- Install the .NET SDK
- Install `dotnet scaffold`: `dotnet tool install -g microsoft.dotnet-scaffold`
- Run `dotnet scaffold`

Expected result: Telemetry notice is displayed without the "Initializing dotnet-scaffold" progress bar.
Actual result: