Add line numbers for suspend function to enhance stepping (KT-16025)

Stop at function start on step into.
Step at function end on step out.

Both cases should actually be skipped by debugger, but this is postponed
till new backend generation for suspend functions is ready.

 #KT-16025 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/coroutines/SuspendFunctionGenerationStrategy.kt

@@ -33,20 +33,18 @@ class SuspendFunctionGenerationStrategy(
 
     override fun doGenerateBody(codegen: ExpressionCodegen, signature: JvmMethodSignature) {
         if (!originalSuspendDescriptor.containsNonTailSuspensionCalls(state.bindingContext)) {
-            return codegen.returnExpression(declaration.bodyExpression)
+            codegen.returnExpression(declaration.bodyExpression)
+            return
         }
 
         val coroutineCodegen = CoroutineCodegen.create(codegen, originalSuspendDescriptor, declaration, state)
         coroutineCodegen.generate()
 
+        codegen.markLineNumber(declaration, false)
         codegen.putClosureInstanceOnStack(coroutineCodegen, null).put(Type.getObjectType(coroutineCodegen.className), codegen.v)
+        codegen.v.invokeDoResumeWithUnit(coroutineCodegen.v.thisName)
 
-        with(codegen.v) {
-            invokeDoResumeWithUnit(coroutineCodegen.v.thisName)
-
-            codegen.markLineNumber(declaration, true)
-
-            areturn(AsmTypes.OBJECT_TYPE)
-        }
+        codegen.markLineNumber(declaration, true)
+        codegen.v.areturn(AsmTypes.OBJECT_TYPE)
     }
 }