isTruncated may return YES incorrectly during initial layout passes

[Adlai-Holler]

The conditions under which this happens are unclear, but we've got a report from Pinterest that during the first pass, a text node which was not truncated returned isTruncated=YES. They made a layout decision based on that erroneous value. During the next layout pass, the flag returned NO correctly.

This would probably be addressed by ASTextNode2.

https://jira.pinadmin.com/browse/BUG-73097