Work around KT-60304 by suppressing "INVISIBLE_SETTER"

Author: dkhalanskyjb

kotlinx-coroutines-test/common/src/TestCoroutineDispatchers.kt

@@ -93,7 +93,8 @@ private class UnconfinedTestDispatcherImpl(
 
     override fun isDispatchNeeded(context: CoroutineContext): Boolean = false
 
-    @Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE") // do not remove the INVISIBLE_REFERENCE suppression: required in K2
+    // do not remove the INVISIBLE_REFERENCE and INVISIBLE_SETTER suppressions: required in K2
+    @Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE", "INVISIBLE_SETTER")
     override fun dispatch(context: CoroutineContext, block: Runnable) {
         checkSchedulerInContext(scheduler, context)
         scheduler.sendDispatchEvent(context)