[JVM] Port line number tests to stepping framework.

Allow specifying JVM and JVM_IR as well as shared expectations.

Add the method name to the step.

Discard steps in synthetic methods.

compiler/testData/debug/stepping/simpleInlineDefaultArg.kt

@@ -11,8 +11,8 @@ fun box(): String {
 }
 
 // LINENUMBERS
-// test.kt:10
-// test.kt:5
-// test.kt:3
-// test.kt:6
-// test.kt:10
+// test.kt:10 box
+// test.kt:5 box
+// test.kt:3 box
+// test.kt:6 box
+// test.kt:10 box