Safely check for suspend function parent

The issue here is that the function can be in unlowered file, and
thus its parent package fragment and not class.

 #KT-49317 Fixed

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/JsCodegenBoxTestGenerated.java

@@ -7157,6 +7157,12 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/coroutines/kt49168.kt");
         }
 
+        @Test
+        @TestMetadata("kt49317.kt")
+        public void testKt49317() throws Exception {
+            runTest("compiler/testData/codegen/box/coroutines/kt49317.kt");
+        }
+
         @Test
         @TestMetadata("kt51530.kt")
         public void testKt51530() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrJsCodegenBoxTestGenerated.java

@@ -7199,6 +7199,12 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/coroutines/kt49168.kt");
         }
 
+        @Test
+        @TestMetadata("kt49317.kt")
+        public void testKt49317() throws Exception {
+            runTest("compiler/testData/codegen/box/coroutines/kt49317.kt");
+        }
+
         @Test
         @TestMetadata("kt51530.kt")
         public void testKt51530() throws Exception {

js/js.tests/tests-gen/org/jetbrains/kotlin/js/testOld/wasm/semantics/IrCodegenBoxWasmTestGenerated.java

@@ -6241,6 +6241,11 @@ public class IrCodegenBoxWasmTestGenerated extends AbstractIrCodegenBoxWasmTest
             runTest("compiler/testData/codegen/box/coroutines/kt49168.kt");
         }
 
+        @TestMetadata("kt49317.kt")
+        public void testKt49317() throws Exception {
+            runTest("compiler/testData/codegen/box/coroutines/kt49317.kt");
+        }
+
         @TestMetadata("kt51530.kt")
         public void testKt51530() throws Exception {
             runTest("compiler/testData/codegen/box/coroutines/kt51530.kt");