[GStreamer] Gardening

https://bugs.webkit.org/show_bug.cgi?id=265081

Unreviewed, update a couple flaky crash media tests expectations.

* LayoutTests/platform/glib/TestExpectations:
* LayoutTests/platform/gtk/TestExpectations:

Canonical link: https://commits.webkit.org/270936@main

LayoutTests/platform/glib/TestExpectations

@@ -1220,6 +1220,7 @@ webkit.org/b/254207 media/media-source/media-source-monitor-playing-event.html [
 
 webkit.org/b/264708 [ Debug ] media/media-source/media-source-error-crash.html [ Pass Crash ]
 webkit.org/b/264708 [ Debug ] imported/w3c/web-platform-tests/media-source/mediasource-errors.html [ Pass Crash ]
+webkit.org/b/264708 [ Debug ] imported/w3c/web-platform-tests/media-source/mediasource-invalid-codec.html [ Pass Crash ]
 
 webkit.org/b/264934 imported/w3c/web-platform-tests/webaudio/the-audio-api/the-audioworklet-interface/audioworklet-registerprocessor-called-on-globalthis.https.html [ Pass Crash ]
 

LayoutTests/platform/gtk/TestExpectations

@@ -1673,7 +1673,7 @@ webkit.org/b/257624 fast/canvas/webgl/webgl-drawarrays-crash-2.html [ Failure Pa
 webkit.org/b/257624 fast/canvas/webgl/webgl-drawarrays-crash.html [ Failure Pass ]
 webkit.org/b/257624 fast/mediastream/MediaStream-video-element-track-stop.html [ Failure Timeout ]
 webkit.org/b/257624 http/tests/frame-throttling/raf-throttle-in-cross-origin-subframe.html [ Failure Pass ]
-webkit.org/b/257624 http/tests/security/video-cross-origin-caching.html [ Pass Timeout ]
+webkit.org/b/257624 http/tests/security/video-cross-origin-caching.html [ Pass Timeout Crash ]
 webkit.org/b/257624 http/tests/websocket/tests/hybi/multiple-connections.html [ Pass Timeout ]
 webkit.org/b/257624 http/tests/websocket/tests/hybi/multiple-connections-limit.html [ Pass Timeout ]
 webkit.org/b/257624 http/wpt/cross-origin-opener-policy/header-parsing-with-report-to.https.html [ Failure Pass ]