[Enhancement] Deprecate file_client_args and use backend_args instead

[gaotongxiao]

Upgrade to use the new MMEngine interface. This upgrade requires mmcv >= 2.0.0rc4, which is already required by 1.0.0rc6.

Motivation

Use the new interface of fileio from MMEngine which requires mmengine>=0.2.0.
Refer to open-mmlab/mmcv#2468, open-mmlab/mmcv#2539

mmcv<2.0.0rc4: need to set the file_client_args to indicate the backend, if the file_client_args is None, the default option will be disk backend.
mmcv>=2.0.0rc4 : The function in fileio from MMEngine will automatically deal with different backends according to the prefix of data_root, if parameter backend_args is None

Reference

open-mmlab/mmselfsup#662

[codecov]

Codecov Report

Patch coverage: 30.97% and project coverage change: -0.60 ⚠️

Comparison is base (33cbc9b) 90.30% compared to head (251627f) 89.70%.

❗ Current head 251627f differs from pull request most recent head 5cc8513. Consider uploading reports for the commit 5cc8513 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           dev-1.x    #1765      +/-   ##
===========================================
- Coverage    90.30%   89.70%   -0.60%     
===========================================
  Files          189      190       +1     
  Lines        11093    11186      +93     
  Branches      1563     1578      +15     
===========================================
+ Hits         10017    10034      +17     
- Misses         769      841      +72     
- Partials       307      311       +4     

Flag	Coverage Δ
unittests	89.70% <30.97%> (-0.60%)	⬇️

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

Impacted Files	Coverage Δ
...atasets/preparers/obtainers/naive_data_obtainer.py	16.82% <ø> (ø)
...ecog/recognizers/encoder_decoder_recognizer_tta.py	100.00% <ø> (ø)
mmocr/datasets/preparers/dumpers/lmdb_dumper.py	21.33% <21.33%> (ø)
mmocr/datasets/transforms/loading.py	88.70% <33.33%> (-7.60%)	⬇️
mmocr/datasets/preparers/config_generators/base.py	75.00% <37.50%> (-7.50%)	⬇️
...rs/config_generators/textrecog_config_generator.py	100.00% <100.00%> (ø)
mmocr/datasets/recog_text_dataset.py	100.00% <100.00%> (ø)
mmocr/engine/hooks/visualization_hook.py	92.30% <100.00%> (+3.67%)	⬆️
mmocr/version.py	100.00% <100.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.