Fix #16929 do not show profile load time msg with new pwsh parameter (#17535)

* Fix #16929 do not show profile load time msg by default

This PR adds a new pwsh command line parameter to enable display of the
profile load time message.

* Switch to an opt-out paramater called -NoProfileLoadTime

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

@@ -186,6 +186,7 @@ namespace Microsoft.PowerShell
             "nologo",
             "noninteractive",
             "noprofile",
+            "noprofileloadtime",
             "outputformat",
             "removeworkingdirectorytrailingcharacter",
             "settingsfile",
@@ -228,6 +229,7 @@ namespace Microsoft.PowerShell
             WindowStyle         = 0x01000000, // -WindowStyle | -w
             WorkingDirectory    = 0x02000000, // -WorkingDirectory | -wd
             ConfigurationFile   = 0x04000000, // -ConfigurationFile
+            NoProfileLoadTime   = 0x08000000, // -NoProfileLoadTime
             // Enum values for specified ExecutionPolicy
             EPUnrestricted      = 0x0000000100000000, // ExecutionPolicy unrestricted
             EPRemoteSigned      = 0x0000000200000000, // ExecutionPolicy remote signed
@@ -463,6 +465,15 @@ namespace Microsoft.PowerShell
             }
         }
 
+        internal bool NoProfileLoadTime
+        {
+            get
+            {
+                AssertArgumentsParsed();
+                return _noProfileLoadTime;
+            }
+        }
+
         internal bool ShowVersion
         {
             get
@@ -920,6 +931,11 @@ namespace Microsoft.PowerShell
                     _sshServerMode = true;
                     ParametersUsed |= ParameterBitmap.SSHServerMode;
                 }
+                else if (MatchSwitch(switchKey, "noprofileloadtime", "noprofileloadtime"))
+                {
+                    _noProfileLoadTime = true;
+                    ParametersUsed |= ParameterBitmap.NoProfileLoadTime;
+                }
                 else if (MatchSwitch(switchKey, "interactive", "i"))
                 {
                     _noInteractive = false;
@@ -1496,6 +1512,7 @@ namespace Microsoft.PowerShell
         private bool _serverMode;
         private bool _namedPipeServerMode;
         private bool _sshServerMode;
+        private bool _noProfileLoadTime;
         private bool _showVersion;
         private string? _configurationFile;
         private string? _configurationName;

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

@@ -1885,7 +1885,7 @@ namespace Microsoft.PowerShell
                     sw.Stop();
 
                     var profileLoadTimeInMs = sw.ElapsedMilliseconds;
-                    if (profileLoadTimeInMs > 500 && s_cpp.ShowBanner)
+                    if (s_cpp.ShowBanner && !s_cpp.NoProfileLoadTime && profileLoadTimeInMs > 500)
                     {
                         Console.Error.WriteLine(ConsoleHostStrings.SlowProfileLoadingMessage, profileLoadTimeInMs);
                     }

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

@@ -149,8 +149,10 @@
                   [-EncodedCommand <Base64EncodedCommand>]
                   [-ExecutionPolicy <ExecutionPolicy>] [-InputFormat {Text | XML}]
                   [-Interactive] [-MTA] [-NoExit] [-NoLogo] [-NonInteractive] [-NoProfile]
-                  [-OutputFormat {Text | XML}] [-SettingsFile <filePath>] [-SSHServerMode] [-STA]
-                  [-Version] [-WindowStyle <style>] [-WorkingDirectory <directoryPath>]
+                  [-NoProfileLoadTime] [-OutputFormat {Text | XML}] 
+                  [-SettingsFile <filePath>] [-SSHServerMode] [-STA] 
+                  [-Version] [-WindowStyle <style>] 
+                  [-WorkingDirectory <directoryPath>]
 
        pwsh[.exe] -h | -Help | -? | /?
 
@@ -399,6 +401,11 @@ All parameters are case-insensitive.</value>
 
     Does not load the PowerShell profiles.
 
+-NoProfileLoadTime
+
+    Hides the PowerShell profile load time text shown at startup when the load
+    time exceeds 500 milliseconds.
+
 -OutputFormat | -o | -of
 
     Determines how output from PowerShell is formatted. Valid values are "Text"