feat(storage): avoid copy key slice in storage table iter when unnece…

…ssary (#19717)

src/ctl/src/cmd_impl/table/scan.rs

@@ -145,7 +145,7 @@ async fn do_scan(table: TableCatalog, hummock: MonitoredStateStore<HummockStorag
         .await?;
     pin_mut!(stream);
     while let Some(item) = stream.next().await {
-        println!("{:?}", item?.into_owned_row());
+        println!("{:?}", item?);
     }
     Ok(())
 }

src/storage/hummock_sdk/src/key.rs

@@ -440,7 +440,7 @@ impl SetSlice<Bytes> for Bytes {
     }
 }
 
-pub trait CopyFromSlice {
+pub trait CopyFromSlice: Send + 'static {
     fn copy_from_slice(slice: &[u8]) -> Self;
 }
 
@@ -456,6 +456,10 @@ impl CopyFromSlice for Bytes {
     }
 }
 
+impl CopyFromSlice for () {
+    fn copy_from_slice(_: &[u8]) -> Self {}
+}
+
 /// [`TableKey`] is an internal concept in storage. It's a wrapper around the key directly from the
 /// user, to make the code clearer and avoid confusion with encoded [`UserKey`] and [`FullKey`].
 ///