Add regression test

Author: nicolasstucki

tests/neg/i7052b.scala

@@ -0,0 +1,10 @@
+import scala.quoted._
+class Test {
+  def foo(str: String) given QuoteContext = '{
+    delegate for QuoteContext = ???
+    '{
+      @deprecated(str, "") // error
+      def bar = ???
+    }
+  }
+}