Move the tests for package scopes to the module interface tests

Author: phausler

test/ModuleInterface/Observable.swift

@@ -1,6 +1,6 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-swift-emit-module-interface(%t/Library.swiftinterface) %s -module-name Library -plugin-path %swift-plugin-dir -disable-availability-checking
-// RUN: %target-swift-typecheck-module-from-interface(%t/Library.swiftinterface) -module-name Library -disable-availability-checking
+// RUN: %target-swift-emit-module-interface(%t/Library.swiftinterface) %s -package-name Library -module-name Library -plugin-path %swift-plugin-dir -disable-availability-checking
+// RUN: %target-swift-typecheck-module-from-interface(%t/Library.swiftinterface) -package-name Library -module-name Library -disable-availability-checking
 // RUN: %FileCheck %s < %t/Library.swiftinterface
 
 // REQUIRES: swift_swift_parser
@@ -15,6 +15,7 @@ import Observation
 @Observable
 public class SomeClass {
   public var field = 3
+  package var test = 4
   @ObservationIgnored public var ignored = 4
 }
 

test/stdlib/Observation/Observable.swift

@@ -31,11 +31,6 @@ public class PublicContainsWeak {
   public weak var obj: AnyObject? = nil
 }
 
-@Observable
-class ContainsPackage {
-  package var contents: Int = 0
-}
-
 @Observable
 class ContainsUnowned {
   unowned var obj: AnyObject? = nil