Introduce 'SuspendFunction$n<...>' types.

compiler/testData/diagnostics/tests/coroutines/suspendFunctionType/modifierApplicability.kt

@@ -0,0 +1,14 @@
+typealias Action = () -> Unit
+
+interface SAM {
+    fun run()
+}
+
+typealias Test1 = suspend () -> Unit
+typealias Test2 = suspend Int.(String) -> Unit
+typealias Test3 = <!WRONG_MODIFIER_TARGET!>suspend<!> Function0<Unit>
+typealias Test4 = <!WRONG_MODIFIER_TARGET!>suspend<!> Action
+typealias Test5 = List<suspend () -> Unit>
+typealias Test6 = <!WRONG_MODIFIER_TARGET!>suspend<!> List<() -> Unit>
+typealias Test7 = <!WRONG_MODIFIER_TARGET!>suspend<!> SAM
+typealias Test8 = SuspendFunction0<Unit>

compiler/testData/diagnostics/tests/coroutines/suspendFunctionType/modifierApplicability.txt

@@ -0,0 +1,17 @@
+package
+
+public interface SAM {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public abstract fun run(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+public typealias Action = () -> kotlin.Unit
+public typealias Test1 = suspend () -> kotlin.Unit
+public typealias Test2 = suspend kotlin.Int.(kotlin.String) -> kotlin.Unit
+public typealias Test3 = () -> kotlin.Unit
+public typealias Test4 = Action
+public typealias Test5 = kotlin.collections.List<suspend () -> kotlin.Unit>
+public typealias Test6 = kotlin.collections.List<() -> kotlin.Unit>
+public typealias Test7 = SAM
+public typealias Test8 = suspend () -> kotlin.Unit