Review fixes for smart casts in / out loops.

LoopTypeInfo became TypeInfoWithJumpInfo rewritten in Kotlin.
Fixed a bug with break inside Elvis inside a loop, a pack of related tests added.
isTrueConstant moved to JetPsiUtil.

compiler/testData/diagnostics/tests/smartCasts/loops/elvisInsideDoWhile.kt

@@ -0,0 +1,9 @@
+public fun foo(x: String?): Int {
+    do {
+        // After the check, smart cast should work
+        x ?: x!!.length()
+        // x is not null in both branches
+        if (<!DEBUG_INFO_SMARTCAST!>x<!>.length() == 0) break
+    } while (true)
+    return <!DEBUG_INFO_SMARTCAST!>x<!>.length()
+}