[JS IR BE] Support coroutines

* Move FinallyBlockLowering to common part
* Fix catching of dynamic exception
* Fix bridges for suspend functions
* Disable explicit cast to Unit
* Run lowering per module
* Update some test data

compiler/testData/codegen/box/callableReference/function/newArray.kt

@@ -1,5 +1,4 @@
 // IGNORE_BACKEND: JVM_IR
-// IGNORE_BACKEND: JS_IR
 private fun <T> upcast(value: T): T = value
 
 fun box(): String {