Editor: Move blocks/classic -> blocks/freeform

Moves src/wp-includes/blocks/classic to src/wp-includes/blocks/freeform. This
reflects the 'classic' block being renamed to 'freeform'.

Follows [50048].
See #52334.

Built from https://develop.svn.wordpress.org/trunk@50066


git-svn-id: http://core.svn.wordpress.org/trunk@49767 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/blocks/classic/block.json

@@ -1,17 +0,0 @@
-{
-	"apiVersion": 2,
-	"name": "core/freeform",
-	"category": "text",
-	"attributes": {
-		"content": {
-			"type": "string",
-			"source": "html"
-		}
-	},
-	"supports": {
-		"className": false,
-		"customClassName": false,
-		"reusable": false
-	},
-	"editorStyle": "wp-block-freeform-editor"
-}

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-alpha-50065';
+$wp_version = '5.7-alpha-50066';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.