JVM IR: copy corresponding property+annotations for DefaultImpls methods

Instead of using methodSignatureMapper which was an obsolete hack to
make accessor names "getFoo" instead of "<get-foo>".

In particular, this keeps the `@Deprecated` annotation on the
corresponding property, which results in ACC_DEPRECATED in codegen.

 #KT-43326 Fixed

compiler/testData/codegen/bytecodeListing/deprecated/deprecatedProperty.kt

@@ -51,3 +51,8 @@ var <T> List<T>.textGenExtVar
     get() = 1
     set(v) {}
 
+interface I {
+    @Deprecated("")
+    val <T> T.id: T
+        get() = this
+}