v1.16: Uses hex for the hash in accounts hash cache file names (backp…

…ort of #33196) (#33223)

(cherry picked from commit 21e7f98)

Co-authored-by: Brooks <brooks@solana.com>

runtime/src/accounts_db.rs

@@ -7135,7 +7135,7 @@ impl AccountsDb {
                     // so, build a file name:
                     let hash = hasher.finish();
                     let file_name = format!(
-                        "{}.{}.{}.{}.{}",
+                        "{}.{}.{}.{}.{:016x}",
                         range_this_chunk.start,
                         range_this_chunk.end,
                         bin_range.start,