Set the default value of distributed_dataloader to true.

[Jonathans575]

Before submitting

• Lint code. If there are lint issues, please format the code first.

# Install and register `pre-commit` in the project folder
pip install pre-commit && pre-commit install

# Process previous code files separately
pre-commit run --file XXXX.py

• Add test cases into tests folder. If there are codecov issues, please add tests cases first.

PR types

PR changes

Description

[paddle-bot]

Thanks for your contribution!

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (develop@090c22f). Learn more about missing BASE report.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #4331   +/-   ##
==========================================
  Coverage           ?   39.00%           
==========================================
  Files              ?      474           
  Lines              ?    89700           
  Branches           ?        0           
==========================================
  Hits               ?    34984           
  Misses             ?    54716           
  Partials           ?        0           

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