Block Bindings: Add block_bindings_supported_attributes filter.

Add a block-agnostic version of the `block_bindings_supported_attributes_{$block_type}` filter first introduced in [60611].

This allows adding block bindings support for attributes of multiple different blocks in one go.

Follow-up to [60611].
Props bernhard-reiter.
See #62090.

git-svn-id: https://develop.svn.wordpress.org/trunk@60790 602fd350-edb4-49c9-b593-d223f7449a82

Author: ockham

src/wp-includes/class-wp-block.php

@@ -301,6 +301,20 @@ private function process_block_bindings() {
 			self::BLOCK_BINDINGS_SUPPORTED_ATTRIBUTES[ $block_type ] ??
 			array();
 
+		/**
+		 * Filters the supported block attributes for block bindings.
+		 *
+		 * @since 6.9.0
+		 *
+		 * @param string[] $supported_block_attributes The block's attributes that are supported by block bindings.
+		 * @param string   $block_type                 The block type whose attributes are being filtered.
+		 */
+		$supported_block_attributes = apply_filters(
+			'block_bindings_supported_attributes',
+			$supported_block_attributes,
+			$block_type
+		);
+
 		/**
 		 * Filters the supported block attributes for block bindings.
 		 *