Update Rust toolchain to 1.89 (#19807)

crates/ty_python_semantic/src/module_resolver/mod.rs

@@ -21,7 +21,7 @@ mod typeshed;
 mod testing;
 
 /// Returns an iterator over all search paths pointing to a system path
-pub fn system_module_search_paths(db: &dyn Db) -> SystemModuleSearchPathsIter {
+pub fn system_module_search_paths(db: &dyn Db) -> SystemModuleSearchPathsIter<'_> {
     SystemModuleSearchPathsIter {
         inner: search_paths(db),
     }

crates/ty_python_semantic/src/module_resolver/resolver.rs

@@ -153,7 +153,7 @@ pub(crate) fn file_to_module(db: &dyn Db, file: File) -> Option<Module<'_>> {
     }
 }
 
-pub(crate) fn search_paths(db: &dyn Db) -> SearchPathIterator {
+pub(crate) fn search_paths(db: &dyn Db) -> SearchPathIterator<'_> {
     Program::get(db).search_paths(db).iter(db)
 }