fix: copy into table collect files twice some times.

[youngsofun]

I hereby agree to the terms of the CLA available at: https://docs.databend.com/dev/policies/cla/

Summary

add a log by the way which will be helpful for debugging #17284

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

---

This change is 

[what-the-diff]

PR Summary

• Introduction of new files_collected field
  The Binder structure now features a new field named files_collected. This field, which is initially set as false, serves to monitor whether files have been gathered or not.

• Updating bind_copy_into_table_from_location method
  This method has been updated to adjust the value of files_collected. Once all files are successfully collected, files_collected is then updated to true.

• Introduction of files_collected field in CopyIntoTablePlan struct
  Just like the change made to the Binder structure, a new files_collected field is now also part of the CopyIntoTablePlan structure. This further streamlines the process of tracking file collection.

• Modification of collect_files method
  A major modification has been implemented in the collect_files method. Now, whenever the system checks if files_collected is true, it immediately exits if it detects that all necessary files have already been captured. This removes the redundancy in file collection and improves the efficiency of the entire process.