Minor. Use more granular assertion levels in assertion tests

compiler/testData/codegen/box/assert/jvm/suspendFunctionAssertionsEnabled.kt

@@ -5,6 +5,8 @@
 // WITH_COROUTINES
 // COMMON_COROUTINES_TEST
 
+package suspendFunctionAssertionsEnabled
+
 import helpers.*
 import COROUTINES_PACKAGE.*
 
@@ -18,8 +20,8 @@ class Dummy
 
 fun enableAssertions(): Checker {
     val loader = Dummy::class.java.classLoader
-    loader.setDefaultAssertionStatus(true)
-    val c = loader.loadClass("Checker")
+    loader.setPackageAssertionStatus("suspendFunctionAssertionsEnabled", true)
+    val c = loader.loadClass("suspendFunctionAssertionsEnabled.Checker")
     return c.newInstance() as Checker
 }