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/lambdaDeclaresAndModifiesInLoop.kt

@@ -0,0 +1,12 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+fun run(f: () -> Unit) = 0
+
+fun foo(arg: Int?) {
+    run {
+        var x = arg
+        while (x != null) {
+            x = <!DEBUG_INFO_SMARTCAST!>x<!>.hashCode()
+            if (x == 0) x = null
+        }
+    }
+}