[IDE-NI-MIGRATE] Migrate completion tests for new inference

idea/idea-completion/testData/handlers/basic/AddLabelToReturn.kt

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:-NewInference
+
 val v: Boolean = run {
     return<caret> true
 }

idea/idea-completion/testData/handlers/basic/AddLabelToReturn.kt.after

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:-NewInference
+
 val v: Boolean = run {
     return@run <caret>true
 }

idea/idea-completion/testData/handlers/keywords/QualifiedReturnNonUnit.kt

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:-NewInference
+
 fun foo() {
     takeHandler1 {
         takeHandler2({ ret<caret> })

idea/idea-completion/testData/handlers/keywords/QualifiedReturnNonUnit.kt.after

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:-NewInference
+
 fun foo() {
     takeHandler1 {
         takeHandler2({ return@takeHandler2 <caret> })

idea/idea-completion/testData/handlers/keywords/QualifiedReturnNonUnitExplicit.kt

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:-NewInference
+
 fun foo() {
     takeHandler1 {
         takeHandler2({ -> ret<caret> })

idea/idea-completion/testData/handlers/keywords/QualifiedReturnNonUnitExplicit.kt.after

@@ -1,3 +1,5 @@
+// COMPILER_ARGUMENTS: -XXLanguage:-NewInference
+
 fun foo() {
     takeHandler1 {
         takeHandler2({ -> return@takeHandler2 <caret> })