Replace taxonomy_get_tree in path_entity_update

[bennybobw]

Description of the bug

The issue is that path_entity update (of hook_entity_update) calls taxonomy_get_tree. It does so with a parent term. However, even with a parent term defined on the first run that function will attempt to cache the whole taxonomy tree. This is problematic for trees with a lot of terms in them (we've got 100,000+ in this particular taxonomy).

Steps To Reproduce

1. Make a taxonomy with a LOT of terms, so many it will overwhelm your
2. Attempt to save one of the terms in that vocabulary

Actual behavior

PHP will run out of memory!

Expected behavior

I expect it to save properly.

Additional information

I did this on a site with 256M of memory for the php process, php 8.2 and a vocabulary of 100,000+ terms. It was calling entity_load_multiple on all 100,000

[avpaderno]

taxonomy_get_tree() stores in a static variable all the taxonomy term it loads, to optimize the case taxonomy_get_tree() is first called for a term and then for one or more of its child terms.

I wonder if that optimization is necessary, given that:

• taxonomy_get_tree() is usually called to load all the taxonomy terms in a vocabulary and never called for a taxonomy term and then for its child terms
• taxonomy_term_load_multiple() (called by taxonomy_get_tree()) already stores in a static variable the loaded taxonomy terms.