Fix for KT-7306: Implicit array conversions cause ClassCastException at runtime

#KT-7306 Fixed

compiler/testData/codegen/boxWithStdlib/arrays/inProjectionAsParameter.kt

@@ -0,0 +1,9 @@
+fun test(y: Array<in Array<String>>) {
+    y[0] = kotlin.array("OK")
+}
+
+fun box() : String {
+    val x : Array<Array<*>> = kotlin.array(kotlin.array(1))
+    test(x)
+    return x[0][0] as String
+}