`plan_file_optimizer.py` should order entries in subtree->tree consistently to reduce unnecessary plan file diff on plan update.
Pull request: https://github.com/WebKit/WebKit/pull/17823
Committed 268043@main (5ecf78803c5b): <https://commits.webkit.org/268043@main> Reviewed commits have been landed. Closing PR #17823 and removing active labels.
<rdar://problem/115581297>