Make startup aware of Incremental Snapshots (#19550)

runtime/src/snapshot_utils.rs

@@ -836,7 +836,12 @@ pub fn bank_from_latest_snapshot_archives(
     accounts_db_skip_shrink: bool,
     verify_index: bool,
     accounts_index_config: Option<AccountsIndexConfig>,
-) -> Result<(Bank, BankFromArchiveTimings)> {
+) -> Result<(
+    Bank,
+    BankFromArchiveTimings,
+    FullSnapshotArchiveInfo,
+    Option<IncrementalSnapshotArchiveInfo>,
+)> {
     let full_snapshot_archive_info = get_highest_full_snapshot_archive_info(&snapshot_archives_dir)
         .ok_or(SnapshotError::NoSnapshotArchives)?;
 
@@ -888,7 +893,12 @@ pub fn bank_from_latest_snapshot_archives(
         ),
     )?;
 
-    Ok((bank, timings))
+    Ok((
+        bank,
+        timings,
+        full_snapshot_archive_info,
+        incremental_snapshot_archive_info,
+    ))
 }
 
 /// Check to make sure the deserialized bank's slot and hash matches the snapshot archive's slot
@@ -2713,7 +2723,7 @@ mod tests {
         )
         .unwrap();
 
-        let (deserialized_bank, _) = bank_from_latest_snapshot_archives(
+        let (deserialized_bank, ..) = bank_from_latest_snapshot_archives(
             &bank_snapshots_dir,
             &snapshot_archives_dir,
             &[accounts_dir.as_ref().to_path_buf()],