[K/N][test] Reset state in StateMachineChecker before the test

boxInline tests for suspend use StateMachineChecker and share the state
if compiled and run together. The single value accessed from all tests.
It is enough to reset state before the test is run.

compiler/testData/codegen/boxInline/suspend/stateMachine/innerObjectInsideInnerObject.kt

@@ -35,6 +35,7 @@ fun builder(c: suspend () -> Unit) {
 }
 
 fun box(): String {
+    StateMachineChecker.reset()
     builder {
         crossinlineMe {
             StateMachineChecker.suspendHere()