In [34270] introduced lazy loading of comment meta. However, this was only in the context of `WP_Query`. Other parts of the codebase, like `WP_Comment_Query` did not lazily load comment meta. In this change, calls to `update_meta_cache` are now replaced with `wp_lazyload_comment_meta`, that instead of priming comment meta caches, just adds them to the queue to be primed it ever called. This results in far less database queries, as there a number of places where comment meta is being primed unnecessarily and never used. Adding everything to the comment meta queue, also means that if comment meta is used, that is all loaded in a single database / cache call.
Follow on from [55671], [55747].
Props spacedmonkey, peterwilsoncc, flixos90, mukesh27.
Fixes#57801.
Built from https://develop.svn.wordpress.org/trunk@55749
git-svn-id: http://core.svn.wordpress.org/trunk@55261 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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