[Enhancement] Use container in CI

[gaotongxiao]

Modifications

• Use containers in cuda checks which speeds up the CI process.
• Fix the disappearance of test coverage report

[codecov]

Codecov Report

Merging #502 (f1d25e5) into main (e23b765) will decrease coverage by 0.01%.
The diff coverage is 90.90%.

❗ Current head f1d25e5 differs from pull request most recent head 940332c. Consider uploading reports for the commit 940332c to get more accurate results

@@            Coverage Diff             @@
##             main     #502      +/-   ##
==========================================
- Coverage   85.70%   85.69%   -0.02%     
==========================================
  Files         142      142              
  Lines        9532     9539       +7     
  Branches     1365     1364       -1     
==========================================
+ Hits         8169     8174       +5     
- Misses       1047     1048       +1     
- Partials      316      317       +1     

Flag	Coverage Δ
unittests	85.69% <90.90%> (-0.02%)	⬇️

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Impacted Files	Coverage Δ
mmocr/apis/inference.py	68.96% <0.00%> (-1.47%)	⬇️
mmocr/core/evaluation/utils.py	88.98% <100.00%> (+0.29%)	⬆️

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