Avoid retrying renderer init if we know the error was not transient

app/streaming/video/ffmpeg-renderers/vt_avsamplelayer.mm

@@ -388,6 +388,7 @@ public:
             SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
                         "av_hwdevice_ctx_create() failed for VT decoder: %d",
                         err);
+            m_InitFailureReason = InitFailureReason::NoSoftwareSupport;
             return false;
         }