JVM_IR: apply TailCallOptimizationLowering to all suspend functions

Even if a function is known to be tail call because it's a compiler
generated bridge, the tail return might still need to be added in case
of Unit return type.

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -8943,6 +8943,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/unitTypeReturn/coroutineReturn.kt", "kotlin.coroutines");
             }
 
+            @TestMetadata("interfaceDelegation.kt")
+            public void testInterfaceDelegation() throws Exception {
+                runTest("compiler/testData/codegen/box/coroutines/unitTypeReturn/interfaceDelegation.kt");
+            }
+
             @TestMetadata("suspendNonLocalReturn.kt")
             public void testSuspendNonLocalReturn_1_2() throws Exception {
                 runTestWithPackageReplacement("compiler/testData/codegen/box/coroutines/unitTypeReturn/suspendNonLocalReturn.kt", "kotlin.coroutines.experimental");