Enhancement for "join declaration and assignment": now can handle also local variables, relevant inspection added #KT-12095 Fixed

idea/testData/intentions/joinDeclarationAndAssignment/usedLocal2.kt

@@ -0,0 +1,7 @@
+// IS_APPLICABLE: false
+fun foo() {
+    // It's possible here to join with assignment but move the result after declaration of i
+    var b<caret>: Int
+    val i = 0
+    b = i
+}