[Feature] Support auto import modules from registry.

[Harold-lkk]

Motivation

The registry now supports auto-import modules from the given location.

register_all_modules before running is no longer needed. The modules will be lazy-imported during building.

• This PR can be merged after [Feature] Support registry auto import modules. mmengine#643. The MMEngine version should be updated.

[codecov]

Codecov Report

Base: 88.32% // Head: 88.21% // Decreases project coverage by -0.11% ⚠️

Coverage data is based on head (a757c1b) compared to base (f820470).
Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head a757c1b differs from pull request most recent head 9fa97fa. Consider uploading reports for the commit 9fa97fa to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           dev-1.x    #1731      +/-   ##
===========================================
- Coverage    88.32%   88.21%   -0.11%     
===========================================
  Files          176      176              
  Lines        10919    10932      +13     
  Branches      1533     1536       +3     
===========================================
  Hits          9644     9644              
- Misses         993     1007      +14     
+ Partials       282      281       -1     

Flag	Coverage Δ
unittests	88.21% <100.00%> (-0.11%)	⬇️

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

Impacted Files	Coverage Δ
mmocr/apis/inferencers/base_mmocr_inferencer.py	89.47% <100.00%> (+0.11%)	⬆️
mmocr/datasets/transforms/formatting.py	99.12% <100.00%> (+0.10%)	⬆️
mmocr/registry.py	100.00% <100.00%> (ø)
mmocr/utils/setup_env.py	19.04% <0.00%> (-61.91%)	⬇️

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