Avoid repeating the first-run message if lzma archive is missing

If the LZMA archive is missing, the first-run message is printed every time.
This commit fixes that.

Split the first-run message into two pieces:

- The first-run (welcome and telemetry) message is printed only once, no matter
  whether the cache was primed or not.

- The cache-priming message is printed only if the cache is avaialble.
  Otherwise skip the cache introduction and the ccache priming operation.

src/dotnet/Program.cs

@@ -81,6 +81,7 @@ namespace Microsoft.DotNet.Cli
             var lastArg = 0;
             var cliFallbackFolderPathCalculator = new CliFallbackFolderPathCalculator();
             using (INuGetCacheSentinel nugetCacheSentinel = new NuGetCacheSentinel(cliFallbackFolderPathCalculator))
+            using (IFirstTimeUseNoticeSentinel firstTimeUseNoticeSentinel = new FirstTimeUseNoticeSentinel(cliFallbackFolderPathCalculator))
             {
                 for (; lastArg < args.Length; lastArg++)
                 {
@@ -112,7 +113,7 @@ namespace Microsoft.DotNet.Cli
                     }
                     else
                     {
-                        ConfigureDotNetForFirstTimeUse(nugetCacheSentinel, cliFallbackFolderPathCalculator);
+                        ConfigureDotNetForFirstTimeUse(nugetCacheSentinel, firstTimeUseNoticeSentinel, cliFallbackFolderPathCalculator);
 
                         // It's the command, and we're done!
                         command = args[lastArg];
@@ -168,6 +169,7 @@ namespace Microsoft.DotNet.Cli
 
         private static void ConfigureDotNetForFirstTimeUse(
             INuGetCacheSentinel nugetCacheSentinel,
+            IFirstTimeUseNoticeSentinel firstTimeUseNoticeSentinel,
             CliFallbackFolderPathCalculator cliFallbackFolderPathCalculator)
         {
             using (PerfTrace.Current.CaptureTiming())
@@ -184,7 +186,9 @@ namespace Microsoft.DotNet.Cli
                 var dotnetConfigurer = new DotnetFirstTimeUseConfigurer(
                     nugetCachePrimer,
                     nugetCacheSentinel,
-                    environmentProvider);
+                    firstTimeUseNoticeSentinel,
+                    environmentProvider,
+                    Reporter.Output);
 
                 dotnetConfigurer.Configure();
             }