Surround with try/catch should generate more Kotlin-style code (KT-5435)

#KT-5435 Fixed

idea/testData/codeInsight/surroundWith/if/moveDeclarationsOut/val/fullQualifiedType.kt.after

@@ -1,7 +1,6 @@
 fun foo() {
-    val a: kotlin.test.Asserter?
-    if (<caret>) {
-        a = null
+    val a: kotlin.test.Asserter? = if (<caret>) {
+        null
     }
 
     a?.charAt(1)

idea/testData/codeInsight/surroundWith/if/moveDeclarationsOut/val/fullQualifiedTypeWithoutTypeRef.kt.after

@@ -3,9 +3,8 @@ package test
 class A {}
 
 fun foo() {
-    val a: A
-    if (<caret>) {
-        a = test.A()
+    val a = if (<caret>) {
+        test.A()
     }
 
     a.hashCode()

idea/testData/codeInsight/surroundWith/if/moveDeclarationsOut/val/valWithTypeWithInitializer.kt.after

@@ -1,7 +1,6 @@
 fun foo() {
-    val a: String
-    if () {
-        a = "aaa"
+    val a: String = if () {
+        "aaa"
     }
 
     a.charAt(1)

idea/testData/codeInsight/surroundWith/if/moveDeclarationsOut/val/valWoTypeWithInitializer.kt.after

@@ -1,7 +1,6 @@
 fun foo() {
-    val a: String
-    if () {
-        a = "aaa"
+    val a = if () {
+        "aaa"
     }
 
     a.charAt(1)