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

[danroth27]

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: