fix(ext/node): improve comparison of faked objects in deepStrictEqual (#29819)

This commit improves the handling of objects with faked prototypes in
`deepStrictEqual`. This enables `parallel/test-assert-checktag.js`

- `Date` objects are checked by `core.isDate`
- In object comparison, now it checks `obj.toString()` output (The
difference of `Symbol.toStringTag` is now detected).
- Stoped using std's assertion error message for `deepStrictEqual`, but
started using Node.js version of diff string. Now the diff expression is
more compatible with Node.

ext/node/polyfills/assertion_error.ts

@@ -348,8 +348,9 @@ export function createErrDiff(
         `${blue}...${defaultColor}`;
     }
   }
-
-  return `${msg}${skipped ? skippedMsg : ""}\n${res}${other}${end}${indicator}`;
+  return `${msg}${
+    skipped ? skippedMsg : ""
+  }\n${res}${other}${end}${indicator}\n`;
 }
 
 export interface AssertionErrorDetailsDescriptor {