fix(workflows): disable Run.Exit to preserve workflow failure output

Pester 5 Run.Exit terminates the process on failure, preventing
GITHUB_OUTPUT from being written. Override Run.Exit to false so
the Check results step correctly detects test failures.

🤖 - Generated by Copilot

Author: WilliamBerryiii

.github/workflows/pester-tests.yml

@@ -130,6 +130,7 @@ jobs:
 
           try {
             $config = & scripts/tests/pester.config.ps1 -CI @configParams
+            $config.Run.Exit = $false
             $result = Invoke-Pester -Configuration $config
 
             if ($result.FailedCount -gt 0) {