Add WarningsAsErrors param to build commands (#1035)

Author: tustanivsky

.github/workflows/test-linux.yml

@@ -124,7 +124,8 @@ jobs:
             -stage \
             -prereqss \
             -package \
-            -archive
+            -archive \
+            -WarningsAsErrors
           docker exec -w /workspace/checkout/sample unreal bash -c "
             cp -r '/home/gh/Library/Logs/Unreal Engine/LocalBuildLogs' Saved/Logs  "
           docker exec -w /workspace/checkout/sample unreal /home/ue4/UnrealEngine/Engine/Binaries/Linux/"$EDITOR_BINARY" \

.github/workflows/test-windows.yml

@@ -65,7 +65,8 @@ jobs:
             -stage `
             -prereqss `
             -package `
-            -archive
+            -archive `
+            -WarningsAsErrors
           docker exec unreal "C:\UnrealEngine\Engine\Binaries\Win64\$env:EDITOR_BINARY" C:/workspace/checkout/sample/SentryPlayground.uproject `
             -ReportExportPath=C:/workspace/checkout/sample/Saved/Automation `
             -ExecCmds="Automation RunTests Sentry;quit" `