Add support for contract feature in inliner

compiler/testData/codegen/boxInline/contracts/definiteNestedValInitialization.kt

@@ -0,0 +1,27 @@
+// !LANGUAGE: +CallsInPlaceEffect
+// FILE: 1.kt
+package test
+
+import kotlin.internal.contracts.*
+
+@Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
+public inline fun <R> myrun(block: () -> R): R {
+    contract {
+        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+    }
+    return block()
+}
+
+
+// FILE: 2.kt
+import test.*
+
+fun box(): String {
+    val x: Int
+    myrun {
+        myrun {
+            x = 42
+        }
+    }
+    return if (x.inc() == 43) "OK" else "Fail: ${x.inc()}"
+}