`min(10px + 10%)` or `max(10px + 10%)` should collapse to `calc(10px + 10%)`. They currently don't.
<rdar://problem/111986569>
Pull request: https://github.com/WebKit/WebKit/pull/15679
Committed 265893@main (70fc9b224798): <https://commits.webkit.org/265893@main> Reviewed commits have been landed. Closing PR #15679 and removing active labels.