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/localFunChanges.kt

@@ -0,0 +1,14 @@
+fun trans(n: Int, f: () -> Boolean) = if (f()) n else null
+
+fun foo() {
+    var i: Int? = 5    
+    if (i != null) {
+        fun can(): Boolean {
+            i = null
+            return true
+        }
+        i<!UNSAFE_CALL!>.<!>hashCode()
+        trans(<!TYPE_MISMATCH!>i<!>, ::can)
+        i<!UNSAFE_CALL!>.<!>hashCode()
+    }
+}