Apply some Edition 2024 fixes (#13479)

Some `ref`-removal and `use<>` fixes for the Rust Edition 2024
migration, which are also compatible with Rust Edition 2021.

crates/uv-python/src/discovery.rs

@@ -563,7 +563,7 @@ fn find_all_minor(
     implementation: Option<&ImplementationName>,
     version_request: &VersionRequest,
     dir: &Path,
-) -> impl Iterator<Item = PathBuf> {
+) -> impl Iterator<Item = PathBuf> + use<> {
     match version_request {
         &VersionRequest::Any
         | VersionRequest::Default

crates/uv-python/src/downloads.rs

@@ -268,10 +268,10 @@ impl PythonDownloadRequest {
     }
 
     /// Iterate over all [`PythonDownload`]'s that match this request.
-    pub fn iter_downloads(
-        &self,
-        python_downloads_json_url: Option<&str>,
-    ) -> Result<impl Iterator<Item = &'static ManagedPythonDownload> + use<'_>, Error> {
+    pub fn iter_downloads<'a>(
+        &'a self,
+        python_downloads_json_url: Option<&'a str>,
+    ) -> Result<impl Iterator<Item = &'static ManagedPythonDownload> + use<'a>, Error> {
         Ok(ManagedPythonDownload::iter_all(python_downloads_json_url)?
             .filter(move |download| self.satisfied_by_download(download)))
     }

crates/uv-python/src/managed.rs

@@ -191,7 +191,7 @@ impl ManagedPythonInstallations {
     /// This ensures a consistent ordering across all platforms.
     pub fn find_all(
         &self,
-    ) -> Result<impl DoubleEndedIterator<Item = ManagedPythonInstallation>, Error> {
+    ) -> Result<impl DoubleEndedIterator<Item = ManagedPythonInstallation> + use<>, Error> {
         let dirs = match fs_err::read_dir(&self.root) {
             Ok(installation_dirs) => {
                 // Collect sorted directory paths; `read_dir` is not stable across platforms
@@ -243,7 +243,7 @@ impl ManagedPythonInstallations {
     /// Iterate over Python installations that support the current platform.
     pub fn find_matching_current_platform(
         &self,
-    ) -> Result<impl DoubleEndedIterator<Item = ManagedPythonInstallation>, Error> {
+    ) -> Result<impl DoubleEndedIterator<Item = ManagedPythonInstallation> + use<>, Error> {
         let os = Os::from_env();
         let arch = Arch::from_env();
         let libc = Libc::from_env()?;
@@ -269,7 +269,7 @@ impl ManagedPythonInstallations {
     /// - The platform metadata cannot be read
     /// - A directory for the installation cannot be read
     pub fn find_version<'a>(
-        &self,
+        &'a self,
         version: &'a PythonVersion,
     ) -> Result<impl DoubleEndedIterator<Item = ManagedPythonInstallation> + 'a, Error> {
         Ok(self