Media: Introduce `wp_get_attachment_link_attributes` filter.

This changeset introduces the `wp_get_attachment_link_attributes` hook to allow developers to filter the link attributes when getting the attachment link.

Props NathanAtmoz, aaroncampbell, antpb, costdev.
Fixes #41574.

Built from https://develop.svn.wordpress.org/trunk@55262


git-svn-id: http://core.svn.wordpress.org/trunk@54795 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/post-template.php

@@ -1666,7 +1666,24 @@ function wp_get_attachment_link( $post = 0, $size = 'thumbnail', $permalink = fa
 		$link_text = esc_html( pathinfo( get_attached_file( $_post->ID ), PATHINFO_FILENAME ) );
 	}
 
-	$link_html = "<a href='" . esc_url( $url ) . "'>$link_text</a>";
+	/**
+	 * Filters the list of attachment link attributes.
+	 *
+	 * @since 6.2.0
+	 *
+	 * @param array $attributes An array of attributes for the link markup,
+	 *                          keyed on the attribute name.
+	 * @param int   $id         Post ID.
+	 */
+	$attributes = apply_filters( 'wp_get_attachment_link_attributes', array( 'href' => $url ), $_post->ID );
+
+	$link_attributes = '';
+	foreach ( $attributes as $name => $value ) {
+		$value            = 'href' === $name ? esc_url( $value ) : esc_attr( $value );
+		$link_attributes .= ' ' . esc_attr( $name ) . "='" . $value . "'";
+	}
+
+	$link_html = "<a$link_attributes>$link_text</a>";
 
 	/**
 	 * Filters a retrieved attachment page link.

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-alpha-55261';
+$wp_version = '6.2-alpha-55262';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.