Handle situation where KSerializer is absent from immediate supertypes

of the class used in @UseSerializers: Use methods to receive
full list of supertypes.

K1 supertypes() call returned all supertypes, while
IrClass.supertypes and FirClassSymbol.resolvedSuperTypes return only immediate ones.

This lead to a difference in behavior between K1 and K2, and regression
after plugin backend was rewritten from descriptors to IR.

#KT-55340 Fixed

plugins/kotlinx-serialization/tests-gen/org/jetbrains/kotlinx/serialization/runners/SerializationFirBlackBoxTestGenerated.java

@@ -134,6 +134,12 @@ public class SerializationFirBlackBoxTestGenerated extends AbstractSerialization
         public void testTypealiasesTest() throws Exception {
             runTest("plugins/kotlinx-serialization/testData/boxIr/typealiasesTest.kt");
         }
+
+        @Test
+        @TestMetadata("useSerializersChain.kt")
+        public void testUseSerializersChain() throws Exception {
+            runTest("plugins/kotlinx-serialization/testData/boxIr/useSerializersChain.kt");
+        }
     }
 
     @Nested

plugins/kotlinx-serialization/tests-gen/org/jetbrains/kotlinx/serialization/runners/SerializationIrBoxTestGenerated.java

@@ -132,4 +132,10 @@ public class SerializationIrBoxTestGenerated extends AbstractSerializationIrBoxT
     public void testTypealiasesTest() throws Exception {
         runTest("plugins/kotlinx-serialization/testData/boxIr/typealiasesTest.kt");
     }
+
+    @Test
+    @TestMetadata("useSerializersChain.kt")
+    public void testUseSerializersChain() throws Exception {
+        runTest("plugins/kotlinx-serialization/testData/boxIr/useSerializersChain.kt");
+    }
 }