Remove title attributes: the Star Rating

[afercia]

See related #24766 and all the following tickets about title attributes.

The Star Rating (wp_star_rating()) outputs a rating visually rendered with "stars" and optionally the number of ratings.

Hovering the stars, a title attribute appears that repeats the same information already conveyed by text hidden with screen-reaer-text. See screenshot:

I'd propose to simply remove the title attribute:

• sighted users can actually see the stars, no need for a title attribute
• the hidden text is already available for assistive tech users

A proper fix should also hide to assistive technologies the visible number of ratings (already included in the hidden text) using aria-hidden.

[afercia]

Please notice the proposed patch also removes two trailing spaces in /wp-admin/includes/template.php (my editor does that automatically on saving).

[SergeyBiryukov]

In 36092:

Remove redundant title attribute from wp_star_rating(). Hide the visible number of ratings from assistive technologies.

This data is redundant, as the same information is already conveyed by the text hidden with .screen-reader-text class.

Props afercia.
Fixes #35141.