Create From Usage: Fix rendering of nullable types

idea/testData/quickfix/createFromUsage/createVariable/localVariable/afterNullableType.kt

@@ -0,0 +1,8 @@
+// "Create local variable 'foo'" "true"
+// ERROR: Variable 'foo' must be initialized
+
+fun test(): Int? {
+    val foo: Int?
+
+    return foo
+}

idea/testData/quickfix/createFromUsage/createVariable/localVariable/beforeNullableType.kt

@@ -0,0 +1,6 @@
+// "Create local variable 'foo'" "true"
+// ERROR: Variable 'foo' must be initialized
+
+fun test(): Int? {
+    return <caret>foo
+}