Preliminary declaration visitor for estimating local variable's predictability for smart casts

Predictability estimation algorithm is completely new, but backward compatibility should present.
A large set of tests. Some updated tests.
Smart casts allowed for captured variables if they are not modified in closure #KT-9051 Fixed
Also #KT-8643 Fixed
Also #KT-7976 Fixed
Correct handling of lambda arguments in functions #KT-9143 Fixed

compiler/testData/diagnostics/tests/smartCasts/varInsideLocalFun.kt

@@ -0,0 +1,17 @@
+// Based on KT-8643
+public class MyClass
+{
+    fun main() {
+        var str: String? = null
+
+        if (str != null)
+            callback {
+                // Nodoby writes str, smart cast is possible
+                method1(<!DEBUG_INFO_SMARTCAST!>str<!>)
+            }
+    }
+
+    inline fun callback(foo: () ->Unit) = foo()
+
+    fun method1(str: String) = str
+}