Extend timeout for temporal SVC encoding WPT
This patch extends the timeout duration in
temporal-svc-encoding.https.any.js WPT to accommodate the longer
processing time required for AV1 SVC encoding with the libaom encoder.
This adjustment is necessary to prevent timeout issues in our CI
environment.
Differential Revision: https://phabricator.services.mozilla.com/D212306
bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1876438
gecko-commit: 02e1ce846c4ce38a847d39cdbf9ef972f149e48a
gecko-reviewers: media-playback-reviewers, padenot