Move statement: Add or remove empty lines correctly

#KT-14946 Fixed

idea/testData/codeInsight/moveUpDown/classBodyDeclarations/function/functionAtBrace1.kt.after

@@ -5,6 +5,7 @@ class A {
     val x = ""
 
 }
+
 // fun foo
 <caret>fun foo() {
 

idea/testData/codeInsight/moveUpDown/classBodyDeclarations/function/functionAtBrace2.kt.after

@@ -2,6 +2,7 @@
 <caret>fun foo() {
 
 }
+
 // MOVE: up
 // class A
 class A {

idea/testData/codeInsight/moveUpDown/classBodyDeclarations/function/functionAtBrace3.kt.after

@@ -4,6 +4,7 @@ class A {
     // class B
     class B {
     }
+
     // fun foo
     <caret>fun foo() {
 

idea/testData/codeInsight/moveUpDown/classBodyDeclarations/function/functionAtBrace4.kt.after

@@ -5,6 +5,7 @@ class A {
     <caret>fun foo() {
 
     }
+
     // class B
     class B {
     }

idea/testData/codeInsight/moveUpDown/classBodyDeclarations/function/functionAtBrace5.kt.after

@@ -4,6 +4,7 @@ fun foo() {
     // class B
     class B {
     }
+
     // fun foo
     <caret>fun foo() {
 

idea/testData/codeInsight/moveUpDown/classBodyDeclarations/function/functionAtBrace6.kt.after

@@ -5,6 +5,7 @@ fun foo() {
     <caret>fun foo() {
 
     }
+
     // class B
     class B {
     }