Rename LazyLineBreakIterator to CachedTextBreakIteratorFactory
<rdar://problem/110237360>
Pull request: https://github.com/WebKit/WebKit/pull/14660
Committed 264858@main (522c36c64af3): <https://commits.webkit.org/264858@main> Reviewed commits have been landed. Closing PR #14660 and removing active labels.