fix(cpwan): fix the type conversion in ding_env_wrapper

[cpwan]

Description

Related Issue

#482

TODO

Check List

• merge the latest version source branch/repo, and resolve all the conflicts
• pass style check
• pass all the tests

[codecov]

Codecov Report

Merging #483 (d07a341) into main (fbe02b4) will decrease coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #483      +/-   ##
==========================================
- Coverage   85.67%   85.58%   -0.09%     
==========================================
  Files         539      539              
  Lines       43149    43149              
==========================================
- Hits        36968    36930      -38     
- Misses       6181     6219      +38     

Flag	Coverage Δ
unittests	85.58% <100.00%> (-0.09%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
ding/envs/env/ding_env_wrapper.py	90.90% <100.00%> (ø)
ding/framework/message_queue/tests/test_nng.py	42.30% <0.00%> (-57.70%)	⬇️
ding/framework/message_queue/redis.py	32.07% <0.00%> (-45.29%)	⬇️
ding/framework/message_queue/tests/test_redis.py	26.92% <0.00%> (-34.62%)	⬇️
ding/torch_utils/data_helper.py	82.24% <0.00%> (+0.46%)	⬆️
ding/envs/env_manager/subprocess_env_manager.py	77.36% <0.00%> (+0.78%)	⬆️
ding/utils/data/dataloader.py	47.15% <0.00%> (+1.03%)	⬆️
ding/worker/collector/marine_parallel_collector.py	91.24% <0.00%> (+1.38%)	⬆️
ding/worker/learner/comm/flask_fs_learner.py	93.12% <0.00%> (+3.12%)	⬆️
ding/framework/tests/test_parallel.py	96.26% <0.00%> (+3.73%)	⬆️

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