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Changes between Initial Version and Version 6 of Ticket #51928

Ticket #51928
- Property Keywords needs-unit-tests added
- Property Summary changed from Provide plugin update failure data to dot org to Provide plugin/theme update failure data to dot org

initial	v6
1	1	With plugin auto-updates in core there have been instances of update failures leaving the user's site without the update and without any idea why the update failed. We receive core auto-update failure data to dot org and receiving plugin/theme failure data would help significantly in determining the causes of these failures.
2	2
3		I'm mostly guessing from how `class-core-upgrader.php` sends failure data via `wp_version_check( $stats )` and I've added similar data and a call to `wp_~~version_check()` in `class-plugin-upgrader.php`~~
	3	I'm mostly guessing from how `class-core-upgrader.php` sends failure data via `wp_version_check( $stats )` and I've added similar data and a call to `wp_update_{plugins\|themes}()` in `class-wp-upgrader.php` Thanks @pbiron
4	4
5	5	If it actually does send the data to dot org it could be useful. This requires the return of `WP_Error`s at potential points of failure. I have added one of these in #51857.