Add: Unit test to validate core abilities schemas only include valid properties.

[jorgefilipecosta]

On #10510 we fixed an issue where some core abilties used invalid schema-04 properties.
This PR adds a unit test to make all the properties used are valid.

Testing

• Verify the end to end tests pass.
• Apply the following patch:

diff --git a/src/wp-includes/abilities.php b/src/wp-includes/abilities.php
index 0320df3b9f..c71eeb158a 100644
--- a/src/wp-includes/abilities.php
+++ b/src/wp-includes/abilities.php
@@ -219,8 +219,9 @@ function wp_register_core_abilities(): void {
 					),
 					'db_server_info' => array(
 						'type'        => 'string',
 						'description' => __( 'The database server vendor and version string reported by the driver.' ),
+						'examples'    => array( '8.0.34', '10.11.6-MariaDB' ),
 					),
 					'wp_version'     => array(
 						'type'        => 'string',
 						'description' => __( 'The WordPress core version running on this site.' ),

Verify the end to end tests now fail.

Ticket: https://core.trac.wordpress.org/ticket/64384#ticket

[github-actions]

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[github-actions]

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Core Committers: Use this line as a base for the props when committing in SVN:

Props jorgefilipecosta, westonruter.

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[jorgefilipecosta]

Thank you for the suggestions @westonruter, all of them were applied!

[westonruter]

LGTM, but others have better context.

[jorgefilipecosta]

Committed at 0edc4c6