Improve front matter support (#18153)

Co-authored-by: Alexander Kachkaev <alexander@kachkaev.ru>

tests/unit/__snapshots__/visitor-keys.js.snap

@@ -1251,7 +1251,6 @@ exports[`visitor keys glimmer 1`] = `
   ],
   "TextNode": [],
   "UndefinedLiteral": [],
-  "front-matter": [],
 }
 `;
 
@@ -1471,7 +1470,6 @@ exports[`visitor keys html 1`] = `
     "attrs",
     "children",
   ],
-  "front-matter": [],
   "ieConditionalComment": [
     "children",
   ],
@@ -1511,7 +1509,6 @@ exports[`visitor keys postcss 1`] = `
     "nodes",
     "selector",
   ],
-  "front-matter": [],
   "media-colon": [],
   "media-feature": [],
   "media-feature-expression": [
@@ -1603,7 +1600,6 @@ exports[`visitor keys remark 1`] = `
     "children",
   ],
   "footnoteReference": [],
-  "front-matter": [],
   "heading": [
     "children",
   ],

tests/unit/massage-ast.js

@@ -1,4 +1,5 @@
 import massageAst from "../../src/main/massage-ast.js";
+import { normalizePrinter } from "../../src/main/parser-and-printer.js";
 
 test("massageAst", () => {
   const nonNodeObject = { foo: "foo" };
@@ -12,12 +13,12 @@ test("massageAst", () => {
   };
 
   const result = massageAst(ast, {
-    printer: {
+    printer: normalizePrinter({
       massageAstNode: Object.assign(() => {}, {
         ignoredProperties: new Set(["ignored"]),
       }),
       getVisitorKeys: () => ["nodeObject"],
-    },
+    }),
   });
 
   expect(result).not.toBe(ast);