Do not report "redundant suspend" on override / open #KT-21938 Fixed

idea/testData/inspectionsLocal/redundantSuspend/override.kt

@@ -0,0 +1,10 @@
+// PROBLEM: none
+
+interface I {
+    suspend fun f()
+}
+
+class C : I {
+    override <caret>suspend fun f() {
+    }
+}