[ New features]Trainer support dict parameter

[greycooker]

PR types

New features

PR changes

Trainer support dict parameter

Description

how to pass:
cmd line: --dict_parameter '{dict_value}'
json file: "dict_parameter":dict_value

[paddle-bot]

Thanks for your contribution!

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 55.36%. Comparing base (5da340e) to head (cf2c5be).
Report is 41 commits behind head on develop.

Files	Patch %	Lines
paddlenlp/trainer/argparser.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8446      +/-   ##
===========================================
- Coverage    55.42%   55.36%   -0.06%     
===========================================
  Files          617      617              
  Lines        96281    96132     -149     
===========================================
- Hits         53366    53226     -140     
+ Misses       42915    42906       -9     

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