Add version to PowerShell banner (#3916)

Fixes #3895

src/Microsoft.PowerShell.ConsoleHost/host/msh/ManagedEntrance.cs

@@ -115,9 +115,10 @@ namespace Microsoft.PowerShell
 #else
                 var banner = ManagedEntranceStrings.ShellBanner;
 #endif
+                var formattedBanner = string.Format(CultureInfo.InvariantCulture, banner, PSVersionInfo.GitCommitId);
                 exitCode = Microsoft.PowerShell.ConsoleShell.Start(
                     configuration,
-                    banner,
+                    formattedBanner,
                     ManagedEntranceStrings.ShellHelp,
                     warning == null ? null : warning.Message,
                     args);

src/Microsoft.PowerShell.ConsoleHost/resources/ManagedEntranceStrings.resx

@@ -118,11 +118,11 @@
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
   <data name="ShellBanner" xml:space="preserve">
-    <value>Windows PowerShell 
+    <value>Windows PowerShell {0}
 Copyright (C) Microsoft Corporation. All rights reserved.</value>
   </data>
   <data name="ShellBannerNonWindowsPowerShell" xml:space="preserve">
-    <value>PowerShell 
+    <value>PowerShell {0}
 Copyright (C) Microsoft Corporation. All rights reserved.</value>
   </data>
   <data name="ShellHelp" xml:space="preserve">