Print original error from accounts dir remove (#15458) (#15466)

(cherry picked from commit 5ccaa6336a)

Co-authored-by: Ryo Onodera <ryoqun@gmail.com>

core/src/validator.rs

@@ -1383,10 +1383,10 @@ fn get_stake_percent_in_gossip(bank: &Bank, cluster_info: &ClusterInfo, log: boo
 
 // Cleanup anything that looks like an accounts append-vec
 fn cleanup_accounts_path(account_path: &std::path::Path) {
-    if std::fs::remove_dir_all(account_path).is_err() {
+    if let Err(e) = std::fs::remove_dir_all(account_path) {
         warn!(
-            "encountered error removing accounts path: {:?}",
-            account_path
+            "encountered error removing accounts path: {:?}: {}",
+            account_path, e
         );
     }
 }