(tests) Exclude Test Kitchen packages from tests

Update the Pester tests to exclude the packages that are installed on
Test Kitchen. Without these exclusions the tests fail as it expects
only the packages being tested.

tests/pester-tests/commands/choco-upgrade.Tests.ps1

@@ -811,7 +811,8 @@ To upgrade a local, or remote file, you may use:
 
             $Setup = Invoke-Choco install $DependentPackage.Name --version $DependentPackage.Version --confirm
             $Setup2 = Invoke-Choco install $BasePackage --version 1.0.0 --confirm
-            $Output = Invoke-Choco upgrade $PackageName --confirm --except="'chocolatey'" $Argument
+            # We need to exclude packages that are in Test Kitchen but not the other environments.
+            $Output = Invoke-Choco upgrade $PackageName --confirm --except="chocolatey,chocolatey.extension,chocolatey-agent,pester,chocolatey-license-business" $Argument
         }
 
         It "Exits with expected result (<ExpectedExit>)" {