Improve range creation

[pgorszkowski-igalia]

https://bugs.webkit.org/show_bug.cgi?id=258866

Reviewed by Xabier Rodriguez-Calvar.

Before this change, finding the place where new range should be added/merged/created was done with linear approach. This change provides logarithmic approach to find the place for new range.

• Source/WebCore/platform/graphics/PlatformTimeRanges.cpp: (WebCore::PlatformTimeRanges::add): (WebCore::PlatformTimeRanges::findLastRangeIndexBefore const):
• Source/WebCore/platform/graphics/PlatformTimeRanges.h:

Canonical link: https://commits.webkit.org/266355@main

[eocanha]

Commits coming from upstream don't need much review. Merging.

(But please, next time add "Co-authored by Asurdej", because this patch is partially based on https://github.com/WebPlatformForEmbedded/WPEWebKit/pull/1073)