Blacklist puzzle test for FromTasty

When running puzzle from Tasty it still harmonizes the types
in the old way.

Here's the diff:
```
~/workspace/dotty/tests/run> diff puzzle.decompiled puzzle.decompiled.out
4,5c4,5
<     scala.Predef.println(if (false) 5.0 else 53.0)
<     val x: scala.Double = if (false) 5.0 else 53.0
---
>     scala.Predef.println(if (false) 5.0 else '5')
>     val x: scala.AnyVal = if (false) 5.0 else '5'
11c11
< }

```

Author: odersky

compiler/test/dotc/run-from-tasty.blacklist

@@ -1,2 +1,5 @@
 # Closure type miss match
 eff-dependent.scala
+
+# It seems we still harmonize types in fromTasty. Not sure where this happens
+puzzle.scala