Skip VT100 tests on Windows Server 2012R2 as console does not support it (#19413)

test/powershell/Language/Scripting/SuppressAnsiEscapeSequence.Tests.ps1

@@ -3,12 +3,19 @@
 
 Describe '$env:__SuppressAnsiEscapeSequences tests' -Tag CI {
     BeforeAll {
+        $originalDefaultParameterValues = $PSDefaultParameterValues.Clone()
+
+        if (-not $host.ui.SupportsVirtualTerminal) {
+            $global:PSDefaultParameterValues["it:skip"] = $true
+        }
+
         $originalSuppressPref = $env:__SuppressAnsiEscapeSequences
         $originalRendering = $PSStyle.OutputRendering
         $PSStyle.OutputRendering = 'Ansi'
     }
 
     AfterAll {
+        $global:PSDefaultParameterValues = $originalDefaultParameterValues
         $env:__SuppressAnsiEscapeSequences = $originalSuppressPref
         $PSStyle.OutputRendering = $originalRendering
     }

test/powershell/Modules/Microsoft.PowerShell.Utility/Get-Error.Tests.ps1

@@ -127,6 +127,11 @@ Describe 'Get-Error tests' -Tag CI {
     }
 
     It 'Get-Error uses Error color for Message and PositionMessage members' {
+
+        if (-not $host.ui.SupportsVirtualTerminal) {
+            Set-ItResult -Skipped -Because 'Windows Server 2012 R2 does not support VT100 escape sequences'
+        }
+
         $suppressVT = $false
         if (Test-Path env:/__SuppressAnsiEscapeSequences) {
             $suppressVT = $true

test/powershell/engine/Formatting/OutputRendering.Tests.ps1

@@ -1,7 +1,16 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 
-Describe 'OutputRendering tests' {
+Describe 'OutputRendering tests' -Tag 'CI' {
+    BeforeAll {
+        $originalDefaultParameterValues = $PSDefaultParameterValues.Clone()
+        # Console host does not support VT100 escape sequences on Windows 2012R2 or earlier
+
+        if (-not $host.ui.SupportsVirtualTerminal) {
+            $global:PSDefaultParameterValues["it:skip"] = $true
+        }
+    }
+
     BeforeEach {
         if ($null -ne $PSStyle) {
             $oldOutputRendering = $PSStyle.OutputRendering