Some params missing docs in `wp_insert_user()`; `$userdata` handled unexpectedly

[dlh]

The current docs for wp_insert_user() include some parameters no longer accepted by default, and a few other parameters are missing.

The attached patch:

• removes the old default contact methods from the $userdata hash notation;
• adds docs for $description, $comment_shortcuts, $admin_color, $use_ssl, and $show_admin_bar_front;
• fixes a typo in the short description, and generalizes the note in the long description about available filters so it doesn't have to keep up with every new one;
• tries to clarify $first_name and $last_name, if I understood them correctly.

The patch also makes a related change to the handling of $comment_shortcuts.

Currently, if $userdata['comment_shortcuts'] = true, the meta value will be 1. But enqueue_comment_hotkeys_js() checks for the string 'true', which is also what edit_user() saves.

With this change, the meta value would be 'true' if $userdata['comment_shortcuts'] is any non-empty value except 'false'.

[rachelbaker]

Looks like there is still a typo in the word string on this line:

@type stirng      $last_name   The user's last name. For new users, will be used 

[rachelbaker]

Retains the verbose pre_user_ filter information and updates the exceptions. Also corrects string typo.

[DrewAPicture]

In 32884:

Update the DocBlock for wp_insert_post() to exclude now-defunct contact method arguments and clarify others.

Also clarifies information on available hooks and adds a changelog entry for when the contact method arguments were removed.

Props dlh, rachelbaker.
See #31588.

[DrewAPicture]

Tests update + argument

[DrewAPicture]

[32884] took care of updating the documentation portion of 31588.diff​.

I split out the code and unit tests changes to 31588.2.diff​, which will need code committer review.

[wonderboymusic]

In 32904:

After [32884], update the default value for comment_shortcuts.

Props dlh, rachelbaker, DrewAPicture.
Fixes #31588.