K1/K2: allow to apply suspend modifier to anonymous function

#KT-57991 Fixed

compiler/psi/src/org/jetbrains/kotlin/resolve/ModifierCheckerHelpers.kt

@@ -217,7 +217,12 @@ val possibleTargetMap = mapOf(
     ),
     NOINLINE_KEYWORD to EnumSet.of(KotlinTarget.VALUE_PARAMETER),
     TAILREC_KEYWORD to EnumSet.of(KotlinTarget.FUNCTION),
-    SUSPEND_KEYWORD to EnumSet.of(KotlinTarget.MEMBER_FUNCTION, KotlinTarget.TOP_LEVEL_FUNCTION, KotlinTarget.LOCAL_FUNCTION),
+    SUSPEND_KEYWORD to EnumSet.of(
+        KotlinTarget.MEMBER_FUNCTION,
+        KotlinTarget.TOP_LEVEL_FUNCTION,
+        KotlinTarget.LOCAL_FUNCTION,
+        KotlinTarget.ANONYMOUS_FUNCTION
+    ),
     EXTERNAL_KEYWORD to EnumSet.of(
         KotlinTarget.FUNCTION,
         KotlinTarget.PROPERTY,

compiler/testData/diagnostics/tests/modifiers/suspendAnonymousFunction.kt

@@ -2,7 +2,7 @@
 // ISSUE: KT-57991
 
 fun foo() {
-    <!WRONG_MODIFIER_TARGET!>suspend<!> fun() {
+    suspend fun() {
 
     }
 }