Emit ProgressRecord in CLIXML minishell output

Instead of never emitting a ProgressRecord if stdout is redirected, continue to emit the CLIXML serialized record when pwsh was started with -OutputFormat xml regardless of redirection. This allows calling processes to receive the progress record from the spawned process when it captures the output.

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

@@ -1331,13 +1331,6 @@ namespace Microsoft.PowerShell
         {
             Dbg.Assert(record != null, "WriteProgress called with null ProgressRecord");
 
-            if (Console.IsOutputRedirected)
-            {
-                // Do not write progress bar when the stdout is redirected.
-                return;
-            }
-
-            // We allow only one thread at a time to update the progress state.)
             if (_parent.ErrorFormat == Serialization.DataFormat.XML)
             {
                 PSObject obj = new PSObject();
@@ -1345,8 +1338,14 @@ namespace Microsoft.PowerShell
                 obj.Properties.Add(new PSNoteProperty("Record", record));
                 _parent.ErrorSerializer.Serialize(obj, "progress");
             }
+            else if (Console.IsOutputRedirected)
+            {
+                // Do not write progress bar when the stdout is redirected.
+                return;
+            }
             else
             {
+                // We allow only one thread at a time to update the progress state.)
                 lock (_instanceLock)
                 {
                     HandleIncomingProgressRecord(sourceId, record);

test/powershell/Host/ConsoleHost.Tests.ps1

@@ -435,6 +435,27 @@ export $envVarName='$guid'
             $out = $out.Split([Environment]::NewLine)[0]
             [System.Management.Automation.Internal.StringDecorated]::new($out).ToString("PlainText") | Should -BeExactly "Exception: boom"
         }
+
+        It "Progress is not emitted when stdout is redirected" {
+            $ps = [powershell]::Create()
+            $null = $ps.AddScript('$a = & ([Environment]::ProcessPath) -Command "Write-Progress -Activity progress"; $a')
+            $actual = $ps.Invoke()
+
+            $ps.HadErrors | Should -BeFalse
+            $actual | Should -BeNullOrEmpty
+            $ps.Streams.Progress | Should -BeNullOrEmpty
+        }
+
+        It "Progress is still emitted with redireciton with XML output" {
+            $ps = [powershell]::Create()
+            $null = $ps.AddScript('$a = & ([Environment]::ProcessPath) -OutputFormat xml -Command "Write-Progress -Activity progress"; $a')
+            $actual = $ps.Invoke()
+
+            $ps.HadErrors | Should -BeFalse
+            $actual | Should -BeNullOrEmpty
+            $ps.Streams.Progress.Count | Should -Be 1
+            $ps.Streams.Progress[0].Activity | Should -Be progress
+        }
     }
 
     Context "Redirected standard output" {