Convert "lift return / assignment" intentions into a single inspection

Also includes minor test fix, related to KT-14900

idea/testData/inspectionsLocal/liftOut/ifToAssignment/.inspection

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.inspections.LiftReturnOrAssignmentInspection

idea/testData/inspectionsLocal/liftOut/ifToAssignment/ifElseIf.kt

@@ -1,4 +1,4 @@
-// IS_APPLICABLE: false
+// PROBLEM: none
 
 fun test(n: Int) {
     var a: String = ""

idea/testData/inspectionsLocal/liftOut/ifToAssignment/ifElseifElseInconsistent.kt

@@ -1,4 +1,4 @@
-// IS_APPLICABLE: false
+// PROBLEM: none
 
 fun test(n: Int) {
     val a: String

idea/testData/inspectionsLocal/liftOut/ifToAssignment/simpleIfWithShadowedVar.kt

@@ -1,4 +1,4 @@
-// IS_APPLICABLE: false
+// PROBLEM: none
 fun <T> doSomething(a: T) {}
 
 fun test(n: Int): String {

idea/testData/inspectionsLocal/liftOut/ifToAssignment/simpleIfWithUnmatchedAssignmentOps.kt

@@ -1,4 +1,4 @@
-// IS_APPLICABLE: false
+// PROBLEM: none
 fun test(s: String): Int {
     var n: Int = 1;
 

idea/testData/inspectionsLocal/liftOut/ifToAssignment/simpleIfWithUnmatchedAssignments.kt

@@ -1,4 +1,4 @@
-// IS_APPLICABLE: false
+// PROBLEM: none
 fun test(n: Int): String {
     var res: String = ""
     var res2: String = ""

idea/testData/inspectionsLocal/liftOut/ifToAssignment/simpleIfWithoutElse.kt

@@ -1,4 +1,4 @@
-// IS_APPLICABLE: false
+// PROBLEM: none
 fun <T> doSomething(a: T) {}
 
 fun test(n: Int): String {

idea/testData/inspectionsLocal/liftOut/ifToAssignment/simpleIfWithoutTerminatingAssignment.kt

@@ -1,4 +1,4 @@
-// IS_APPLICABLE: false
+// PROBLEM: none
 fun <T> doSomething(a: T) {}
 
 fun test(n: Int): String {

idea/testData/inspectionsLocal/liftOut/ifToReturn/.inspection

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.inspections.LiftReturnOrAssignmentInspection

idea/testData/inspectionsLocal/liftOut/ifToReturn/ifElseIf.kt

@@ -1,4 +1,4 @@
-// IS_APPLICABLE: false
+// PROBLEM: none
 
 fun test(n: Int): String {
     <caret>if (n == 1)

idea/testData/inspectionsLocal/liftOut/ifToReturn/ifElseIfElseInconsistent.kt

@@ -1,5 +1,3 @@
-// IS_APPLICABLE: false
-
 fun test(n: Int): String {
     val a: String
     <caret>if (n == 1)

idea/testData/inspectionsLocal/liftOut/ifToReturn/ifElseIfElseInconsistent.kt.after

@@ -0,0 +1,10 @@
+fun test(n: Int): String {
+    val a: String
+    a = if (n == 1)
+        return "one"
+    else if (n == 2)
+        return "two"
+    else
+        "three"
+    return a
+}

idea/testData/inspectionsLocal/liftOut/whenToAssignment/.inspection

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.inspections.LiftReturnOrAssignmentInspection

idea/testData/inspectionsLocal/liftOut/whenToAssignment/simpleWhenWithShadowedVar.kt

@@ -1,4 +1,4 @@
-// IS_APPLICABLE: false
+// PROBLEM: none
 fun <T> doSomething(a: T) {}
 
 fun test(n: Int): String {

idea/testData/inspectionsLocal/liftOut/whenToAssignment/simpleWhenWithUnmatchedAssignments.kt

@@ -1,4 +1,4 @@
-// IS_APPLICABLE: false
+// PROBLEM: none
 fun <T> doSomething(a: T) {}
 
 fun test(n: Int): String {

idea/testData/inspectionsLocal/liftOut/whenToAssignment/simpleWhenWithoutTerminatingAssignment.kt

@@ -1,4 +1,4 @@
-// IS_APPLICABLE: false
+// PROBLEM: none
 fun <T> doSomething(a: T) {}
 
 fun test(n: Int): String {

idea/testData/inspectionsLocal/liftOut/whenToReturn/.inspection

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.inspections.LiftReturnOrAssignmentInspection

idea/testData/intentions/branched/folding/ifToAssignment/.intention

@@ -1 +0,0 @@
-org.jetbrains.kotlin.idea.intentions.branchedTransformations.intentions.FoldIfToAssignmentIntention

idea/testData/intentions/branched/folding/ifToReturn/.intention

@@ -1 +0,0 @@
-org.jetbrains.kotlin.idea.intentions.branchedTransformations.intentions.FoldIfToReturnIntention

idea/testData/intentions/branched/folding/whenToAssignment/.intention

@@ -1 +0,0 @@
-org.jetbrains.kotlin.idea.intentions.branchedTransformations.intentions.FoldWhenToAssignmentIntention

idea/testData/intentions/branched/folding/whenToReturn/.intention

@@ -1 +0,0 @@
-org.jetbrains.kotlin.idea.intentions.branchedTransformations.intentions.FoldWhenToReturnIntention