refactor(daedalus_client): replace serde-xml-rs with quick-xml (#7185)

quick-xml is already the de facto XML (de)serializer used
elsewhere in the workspace (labrinth, app-lib), so consolidate
on it here too. Its serde feature deserializes the existing
maven-metadata.xml structs without any changes. Drops one
redundant dependency from the workspace.

apps/daedalus_client/src/error.rs

@@ -11,7 +11,7 @@ pub enum ErrorKind {
     #[error("Error while deserializing JSON: {0}")]
     SerdeJSON(#[from] serde_json::Error),
     #[error("Error while deserializing XML: {0}")]
-    SerdeXML(#[from] serde_xml_rs::Error),
+    QuickXML(#[from] quick_xml::DeError),
     #[error(
         "Failed to validate file checksum at url {url} with hash {hash} after {tries} tries"
     )]

apps/daedalus_client/src/util.rs

@@ -304,7 +304,7 @@ pub async fn fetch_xml<T: DeserializeOwned>(
     url: &str,
     semaphore: &Arc<Semaphore>,
 ) -> Result<T, Error> {
-    Ok(serde_xml_rs::from_reader(
+    Ok(quick_xml::de::from_reader(
         &*download_file(url, None, semaphore).await?,
     )?)
 }