KtSimpleNameReference: add root prefix support to bindToFqName function

idea/testData/copyPaste/imports/ClassResolvedToPackage.expected.kt

@@ -1,14 +1,8 @@
-// ERROR: Unresolved reference: a
-// ERROR: Unresolved reference: a
-// ERROR: Unresolved reference: a
 package to
 
 import a.a
 
-fun f(i: a.a) {
-    // TODO References shortening doesn't work for package vs class conflicts under the new resolution rules.
-    // After importing 'a.a', expression 'a.a' is unresolved (since 'a' becomes a class).
-    // 'package' in expression syntax might be required to fix it properly.
-    a.a
-    a.a()
+fun f(i: a) {
+    a
+    a()
 }

idea/testData/copyPaste/imports/ClassResolvedToPackage.kt

@@ -6,9 +6,6 @@ class a {
 }
 
 <selection>fun f(i: a) {
-    // TODO References shortening doesn't work for package vs class conflicts under the new resolution rules.
-    // After importing 'a.a', expression 'a.a' is unresolved (since 'a' becomes a class).
-    // 'package' in expression syntax might be required to fix it properly.
     a
     a()
 }</selection>