[JVM IR] Fix lineNumber passing into CoroutineTransformer.

- Get it from `IrFile` & `IrElement.startOffset` instead of descriptor
 - Unmute stepping tests

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/codegen/CoroutineCodegen.kt

@@ -49,11 +49,26 @@ internal fun MethodNode.acceptWithStateMachine(
         irFunction.psiElement ?: classCodegen.irClass.psiElement
     else
         classCodegen.context.suspendLambdaToOriginalFunctionMap[classCodegen.irClass.attributeOwnerId]!!.psiElement
+
+    val lineNumber = if (irFunction.isSuspend) {
+        val irFile = irFunction.file
+        if (irFunction.startOffset >= 0) {
+            // if it suspend function like `suspend fun foo(...)`
+            irFile.fileEntry.getLineNumber(irFunction.startOffset)
+        } else {
+            val klass = classCodegen.irClass
+            if (klass.startOffset >= 0) {
+                // if it suspend lambda transformed into class `runSuspend { .... }`
+                irFile.fileEntry.getLineNumber(klass.startOffset)
+            } else 0
+        }
+    } else element?.let { CodegenUtil.getLineNumberForElement(it, false) } ?: 0
+
     val visitor = CoroutineTransformerMethodVisitor(
         methodVisitor, access, name, desc, signature, exceptions.toTypedArray(),
         obtainClassBuilderForCoroutineState = obtainContinuationClassBuilder,
         reportSuspensionPointInsideMonitor = { reportSuspensionPointInsideMonitor(element as KtElement, state, it) },
-        lineNumber = element?.let { CodegenUtil.getLineNumberForElement(it, false) } ?: 0,
+        lineNumber = lineNumber,
         sourceFile = classCodegen.irClass.file.name,
         languageVersionSettings = languageVersionSettings,
         shouldPreserveClassInitialization = state.constructorCallNormalizationMode.shouldPreserveClassInitialization,

idea/jvm-debugger/jvm-debugger-test/testData/stepping/stepInto/siSuspendFun.out

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JVM_IR
 LineBreakpoint created at siSuspendFun.kt:31
 Run Java
 Connected to the target VM

idea/jvm-debugger/jvm-debugger-test/testData/stepping/stepOut/souSuspendFun.out

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JVM_IR
 LineBreakpoint created at souSuspendFun.kt:9
 Run Java
 Connected to the target VM