ledger-tool: Allow dead slots for slot command when metadata absent

The slot command will reject dead slots by default. This behavior can be
overridden by passing --allow-dead-slots. Additionally, in the event
that transaction metadata is missing or the slot is incomplete in the
blockstore, a best effort attempt will be made to get as much data out
as possible.

This fallback case did not have the allow dead slots parameter plumbed
through, so hook it up to allow fetching dead, partial slots

ledger-tool/src/output.rs

@@ -586,7 +586,11 @@ pub fn output_slot(
         Err(_) => {
             // Transaction metadata could be missing, try to fetch just the
             // entries and leave the metadata fields empty
-            let entries = blockstore.get_slot_entries(slot, /*shred_start_index:*/ 0)?;
+            let entries = blockstore.get_slot_entries_with_shred_info(
+                slot,
+                /*shred_start_index:*/ 0,
+                allow_dead_slots,
+            )?;
 
             let blockhash = entries
                 .last()