[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/classObject.kt

@@ -0,0 +1,50 @@
+// FILE: test.kt
+
+class A {
+    companion object {
+        val prop0 = 1
+        val prop1 = 2
+        fun foo(): Int {
+            return prop0 + prop1
+        }
+    }
+}
+
+fun box() {
+    A.prop0
+    A.prop1
+    A.foo()
+}
+
+// The JVM version hits get getProp line numbers twice. That appears
+// to be because the synthetic accessibility bridges (access$getProp0$cp)
+// have line numbers (of the start of the surrounding class) in the JVM
+// version and they do not have line numbers in the JVM_IR version.
+
+// LINENUMBERS
+// test.kt:14 box
+// test.kt:5 getProp0
+// LINENUMBERS JVM
+// test.kt:5 getProp0
+// LINENUMBERS
+// test.kt:14 box
+// test.kt:15 box
+// test.kt:6 getProp1
+// LINENUMBERS JVM
+// test.kt:6 getProp1
+// LINENUMBERS
+// test.kt:15 box
+// test.kt:16 box
+// test.kt:8 foo
+// test.kt:5 getProp0
+// LINENUMBERS JVM
+// test.kt:5 getProp0
+// LINENUMBERS
+// test.kt:8 foo
+// test.kt:6 getProp1
+// LINENUMBERS JVM
+// test.kt:6 getProp1
+// LINENUMBERS
+// test.kt:8 foo
+// test.kt:16 box
+// test.kt:17 box