Network/Site cache cleaning does not obey cache invalidation suspension

[johnjamesjacoby]

Sites & Networks do not obey the $_wp_suspend_cache_invalidation global when their clean functions are called.

This can result in an excessive number of cache invalidations when this global value is explicitly set.

[johnjamesjacoby]

Check $_wp_suspend_cache_invalidation (and also some related whitespace & order clean-up in clean_blog_cache())

[jeremyfelt]

This makes sense and 40028.diff​ looks good, thanks @johnjamesjacoby. I added tests for the sites cache in 40028.2.diff​.

[johnjamesjacoby]

👍 thanks @jeremyfelt

[jeremyfelt]

In 40346:

Multisite: Respect $_wp_suspend_cache_invalidation when clearing network and site caches.

Props johnjamesjacoby.
Fixes #40028.