Use clean_user_cache in more places.

[spacedmonkey]

There are a number of places in core that should use the clean_user_cache function. This so all caches are correctly cleared / invalidated and the clean_user_cache action is fired.

[mukesh27]

@spacedmonkey, In wp-includes/user.php file, wp_update_user function can we also remove below code with new code.

wp_cache_delete( $user['user_email'], 'useremail' );
wp_cache_delete( $user['user_nicename'], 'userslugs' );

Replace with new below code

clean_user_cache( $ID );

[spacedmonkey]

Good catch @mukesh27

I have updated the patch with 47021.3.diff. I did some testing and ran the unit tests. Tests pass.

[SergeyBiryukov]

In 45715:

Users: Use clean_user_cache() in wp_insert_user(), wp_update_user(), wp_set_password(), add_user_to_blog().

Props spacedmonkey.
Fixes #47021.