K2: do not generate line numbers for delegated members

Psi2ir does not generate them, see
https://github.com/JetBrains/kotlin/blob/1.8.20/compiler/ir/ir.psi2ir/src/org/jetbrains/kotlin/psi2ir/generators/ClassGenerator.kt#L319.

Besides influencing debugger and coverage behavior, it also affects how
conflicting JVM signature diagnostics are reported because they
use offsets to determine which element to report the error on. So after
this change, K1 and K2 behavior is the same in that regard as well.

 #KT-58215 Fixed

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/IrJsSteppingTestGenerated.java

@@ -157,6 +157,12 @@ public class IrJsSteppingTestGenerated extends AbstractIrJsSteppingTest {
         runTest("compiler/testData/debug/stepping/defaultParameter.kt");
     }
 
+    @Test
+    @TestMetadata("delegation.kt")
+    public void testDelegation() throws Exception {
+        runTest("compiler/testData/debug/stepping/delegation.kt");
+    }
+
     @Test
     @TestMetadata("enum.kt")
     public void testEnum() throws Exception {