More accurate CFG for local class constructors (now they are not considered unconditionally executed) #KT-10042 Fixed

compiler/testData/diagnostics/tests/controlFlowAnalysis/initializationInLocalClass.kt

@@ -0,0 +1,21 @@
+fun foo() {
+    var x: String
+    class A {
+        init {
+            x = ""
+        }
+    }
+    // Error! See KT-10042
+    <!UNINITIALIZED_VARIABLE!>x<!>.length
+}
+
+fun bar() {
+    var x: String
+    object: Any() {
+        init {
+            x = ""
+        }
+    }
+    // Ok
+    x.length
+}