Adapt test with failures in different phases

Author: nicolasstucki

tests/neg/i7919.scala

@@ -10,11 +10,9 @@ object Test {
   }
 
   given Expr[Int] // error
-  new Expr[Int] // error
   class Expr2 extends Expr[Int] // error
 
   given Type[Int] // error
-  new Type[Int] // error
   class Type2 extends Type[Int] // error
 
 }

tests/neg/i7919b.scala

@@ -0,0 +1,6 @@
+import scala.quoted._
+
+object Test {
+  new Expr[Int] // error
+  new Type[Int] // error
+}