Add test on smartcasts with reified types

This test introduces very special (for current implementation) case,
when we have smartcast indirectly, via some reified type parameter.

It covers recursive call inSmartCastManager.checkAndRecordPossibleCast(),
which wasn't previously covered by any test in testbase.

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

@@ -0,0 +1,11 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+inline fun <reified T : CharSequence?> foo(y: Any?) {
+    if (y is T?) {
+        if (y != null) {
+            bar(<!DEBUG_INFO_SMARTCAST!>y<!>)
+        }
+    }
+}
+
+fun bar(x: CharSequence) {}

compiler/testData/diagnostics/tests/smartCasts/severalSmartCastsOnReified.txt

@@ -0,0 +1,4 @@
+package
+
+public fun bar(/*0*/ x: kotlin.CharSequence): kotlin.Unit
+public inline fun </*0*/ reified T : kotlin.CharSequence?> foo(/*0*/ y: kotlin.Any?): kotlin.Unit