Correct handling of "Redundant if" for negation case #KT-14575 Fixed

idea/testData/quickfix/redundantIf/negate.kt

@@ -0,0 +1,9 @@
+// "Remove redundant 'if' statement" "true"
+fun bar(value: Int): Boolean {
+    <caret>if (value % 2 == 0) {
+        return false
+    }
+    else {
+        return true
+    }
+}

idea/testData/quickfix/redundantIf/negate.kt.after

@@ -0,0 +1,4 @@
+// "Remove redundant 'if' statement" "true"
+fun bar(value: Int): Boolean {
+    return value % 2 != 0
+}