Do not rely on ADL when invoking std::max_element (#9608)

Summary:
Certain STLs use raw pointers and ADL does not work for them.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9608

Reviewed By: ajkr

Differential Revision: D34583012

Pulled By: riversand963

fbshipit-source-id: 7de6bbc8a080c3e7243ce0d758fe83f1663168aa

db/external_sst_file_ingestion_job.cc

@@ -777,9 +777,10 @@ Status ExternalSstFileIngestionJob::AssignLevelAndSeqnoForIngestedFile(
         const std::vector<FileMetaData*>& level_files =
             vstorage->LevelFiles(lvl);
         const SequenceNumber level_largest_seqno =
-            (*max_element(level_files.begin(), level_files.end(),
+            (*std::max_element(level_files.begin(), level_files.end(),
                                [](FileMetaData* f1, FileMetaData* f2) {
-                            return f1->fd.largest_seqno < f2->fd.largest_seqno;
+                                 return f1->fd.largest_seqno <
+                                        f2->fd.largest_seqno;
                                }))
                 ->fd.largest_seqno;
         // should only assign seqno to current level's largest seqno when