[Trainer] Fix sharding overlap bug

[DesmonDay]

PR types

Bug fixes

PR changes

Others

Description

If enable_sharding_comm_overlap in pipeline_parallel_configs, amp_master_grad must be True.

[paddle-bot]

Thanks for your contribution!

[ZHUI]

LGTM

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 55.36%. Comparing base (a37f53d) to head (c63eb00).

Files	Patch %	Lines
paddlenlp/trainer/training_args.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8333      +/-   ##
===========================================
- Coverage    55.37%   55.36%   -0.01%     
===========================================
  Files          613      613              
  Lines        95870    95872       +2     
===========================================
  Hits         53084    53084              
- Misses       42786    42788       +2     

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