[Gardening]: Migrate macOS Sonoma test expectations to OpenSource, ad…

…d expectation files to Down-Levels

https://bugs.webkit.org/show_bug.cgi?id=259373
rdar://112624778

Unreviewed test gardening.

Add test expectation.

* LayoutTests/platform/mac-ventura/TestExpectations:

Canonical link: https://commits.webkit.org/268020@main

LayoutTests/platform/mac-ventura/TestExpectations

@@ -16,3 +16,6 @@ editing/selection/simple-line-layout-caret-is-gone.html [ Failure ]
 fast/forms/auto-fill-button/input-credit-card-auto-fill-button.html [ Failure ]
 imported/w3c/web-platform-tests/xhr/open-method-case-sensitive.htm [ Failure ]
 imported/w3c/web-platform-tests/mathml/relations/css-styling/display-2.html [ Failure ]
+
+# Failing after OS migration rdar://112624778 (Migrate macOS Sonoma test expectations to OpenSource, add expectation files to Down-Levels (259373))
+http/tests/appcache/fail-on-update-2.html [ Timeout Failure ]