move `DispatchFromDyn` test out of `never_type/`

???

tests/ui/self/dispatch_from_dyn_zst.rs

diff --git a/tests/ui/never_type/dispatch_from_dyn_zst.rs b/tests/ui/self/dispatch_from_dyn_zst.rs
similarity index 100%
rename from tests/ui/never_type/dispatch_from_dyn_zst.rs
rename to tests/ui/self/dispatch_from_dyn_zst.rs