Fix merge imports based on semver

[fibonacci1729]

#2451 introduced topologically_sort_interfaces and correctly calls it at the end of Resolve::merge_packages after modifying interface dependencies. However, merge_world_imports_based_on_semver was not updated with the same fix.

merge_world_imports_based_on_semver calls update_interface_dep_of_type to rewire type aliases from older semver-compatible interfaces to their newer replacements. This changes the dependency edges in the interface graph: an interface A that previously pointed to B_old (positioned before A in the arena) may now point to B_new (positioned after A). This violates the topological ordering invariant that assert_topologically_sorted checks.

The merge path already handled this by calling self.topologically_sort_interfaces(...) after modifying type references, but the semver deduplication path was missed.

[dicej]

Looks reasonable, but CI is unhappy.

[fibonacci1729]

Closing this to further investigate. #2493