Create From Usage: Do not generate type for local variables, but add dummy initializer instead

#KT-6705 Fixed

idea/testData/codeInsight/surroundWith/if/moveDeclarationsOut/var/varWithNotNullableTypeWithInitializer.kt.after

@@ -1,5 +1,5 @@
 fun foo() {
-    var a: String
+    var a: String = ""
     if () {
         a = "aaa"
     }

idea/testData/codeInsight/surroundWith/if/moveDeclarationsOut/var/varWoTypeWithInitializer.kt.after

@@ -1,5 +1,5 @@
 fun foo() {
-    var a: String
+    var a: String = ""
     if () {
         a = "aaa"
     }