[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/while.kt

@@ -0,0 +1,25 @@
+// FILE: test.kt
+
+fun box() {
+    var x = 2
+    while (--x > 0) {
+        "OK"
+    }
+
+    x = 2
+    do {
+        "OK"
+    } while (--x > 0)
+}
+
+// LINENUMBERS
+// test.kt:4 box
+// test.kt:5 box
+// test.kt:6 box
+// test.kt:5 box
+// test.kt:9 box
+// test.kt:11 box
+// test.kt:12 box
+// test.kt:11 box
+// test.kt:12 box
+// test.kt:13 box