Refactor code using resource.extracted_from function

Signed-off-by: Ayan Sinha Mahapatra <ayansmahapatra@gmail.com>
Signed-off-by: Alok Kumar <alokkumarjipura9973@gmail.com>

Author: AyanSinhaMahapatra

src/packagedcode/models.py

@@ -1222,8 +1222,7 @@ def assign_package_to_resources(cls, package, resource, codebase, package_adder=
         # update `for_packages` of a codebase resource.
         package_uid = package.package_uid
         if resource.path.endswith("-extract"):
-            archive_resource_path = resource.path.removesuffix("-extract")
-            archive_resource = codebase.get_resource(archive_resource_path)
+            archive_resource = resource.extracted_from(codebase)
             if archive_resource:
                 package_adder(package_uid, archive_resource, codebase)