JVM_IR: Put continuation parameter before default mask and handler.

This is important for calls using reflection as the reflect
library assumes this ordering of arguments.

It would be nice if this could be handled in the lowerings.
Currently AddContinuationLowering is after
DefaultArgumentStubGenerator. If we could add the continuation
first and then do default stub generation maybe we could avoid
the reshuffling introduced in coroutine codegen in this change.

compiler/testData/codegen/box/coroutines/reflect/callSuspendBy.kt

@@ -2,7 +2,6 @@
 // WITH_COROUTINES
 // WITH_REFLECT
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND: JVM_IR
 
 import helpers.*
 import kotlin.coroutines.*