fix: issue where fouc callback is paused in inactive tabs #86810
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The fouc helper callback queue gets paused in inactive tabs due to the usage of
requestAnimationFrame(which gets paused at the browser level for resource optimization).This means that new tabs opened via ctrl+click and Open Link in New Tab popup only commence loading once you visit them.
This only occurs for Turbpopack builds when using the Pages router.
All Webpack builds do not have this issue nor does App router when combined with Turbopack.
I created a clear repro repo for the issue here to aid reviewing: https://github.com/peterjcaulfield/turbopack-render-bug