Refine definition of whether call is suspension point

It's not about all calls to suspend functions, they may called from non-coroutine code

compiler/resolution/src/org/jetbrains/kotlin/resolve/coroutine/coroutineUtil.kt

@@ -17,10 +17,13 @@
 package org.jetbrains.kotlin.resolve.coroutine
 
 import org.jetbrains.kotlin.descriptors.CallableDescriptor
+import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.descriptors.SimpleFunctionDescriptor
 import org.jetbrains.kotlin.resolve.scopes.receivers.ExtensionReceiver
 import org.jetbrains.kotlin.types.KotlinType
 
+val SUSPENSION_POINT_KEY: FunctionDescriptor.UserDataKey<Boolean> = object : FunctionDescriptor.UserDataKey<Boolean> {}
+
 // Returns suspension function as it's visible within coroutines:
 // E.g. `fun <V> await(f: CompletableFuture<V>): V` instead of `fun <V> await(f: CompletableFuture<V>, machine: Continuation<V>): Unit`
 fun SimpleFunctionDescriptor.createCoroutineSuspensionFunctionView(): SimpleFunctionDescriptor? {
@@ -37,6 +40,7 @@ fun SimpleFunctionDescriptor.createCoroutineSuspensionFunctionView(): SimpleFunc
         setOriginal(newOriginal)
         setValueParameters(valueParameters.subList(0, valueParameters.size - 1))
         setSignatureChange()
+        putUserData(SUSPENSION_POINT_KEY, true)
     }.build()!!
 }