Fix Switch-Process error to include the command that is not found (#18443)

test/powershell/Modules/Microsoft.PowerShell.Core/Exec.Tests.ps1

@@ -48,6 +48,13 @@ Describe 'Switch-Process tests for Unix' -Tags 'CI' {
             ($p | Get-Process).Name -eq 'sleep'
         } -timeout 60000 -interval 100 | Should -BeTrue
     }
+
+    It 'Error is returned if target command is not found' {
+        $invalidCommand = 'doesNotExist'
+        $e = { Switch-Process $invalidCommand } | Should -Throw -ErrorId 'CommandNotFound,Microsoft.PowerShell.Commands.SwitchProcessCommand' -PassThru
+        $e.Exception.Message | Should -BeLike "*'$invalidCommand'*"
+        $e.TargetObject | Should -BeExactly $invalidCommand
+    }
 }
 
 Describe 'Switch-Process for Windows' -Tag 'CI' {