JVM_IR: Add returns unit marker if suspend call returns unit

compiler/testData/codegen/box/coroutines/tailCallOptimizations/inlineWithoutStateMachine_ir.txt

@@ -24,9 +24,7 @@ final class InlineWithoutStateMachineKt$complexSuspend$1 {
 }
 
 @kotlin.Metadata
-@kotlin.coroutines.jvm.internal.DebugMetadata
 final class InlineWithoutStateMachineKt$suspendHere$1 {
-    field L$0: java.lang.Object
     field label: int
     @org.jetbrains.annotations.NotNull field result: java.lang.Object
     public method <init>(p0: kotlin.coroutines.Continuation): void

compiler/testData/codegen/box/coroutines/tailCallOptimizations/unit/simple.kt

@@ -1,6 +1,5 @@
 // IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND: JVM_IR
 // FULL_JDK
 // WITH_RUNTIME
 // WITH_COROUTINES