Revert mrcnn for test_otx_explain_e2e_cli

[negvet]

Summary

Job https://github.com/openvinotoolkit/training_extensions/actions/runs/8985016656

How to test

Checklist

• I have added unit tests to cover my changes.​
• I have added integration tests to cover my changes.​
• I have ran e2e tests and there is no issues.
• I have added the description of my changes into CHANGELOG in my target branch (e.g., CHANGELOG in develop).​
• I have updated the documentation in my target branch accordingly (e.g., documentation in develop).
• I have linked related issues.

License

• I submit my code changes under the same Apache License that covers the project.
  Feel free to contact the maintainers if that's a concern.
• I have updated the license header for each file (see an example below).

# Copyright (C) 2024 Intel Corporation
# SPDX-License-Identifier: Apache-2.0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.20%. Comparing base (14d4f54) to head (bb19069).

Additional details and impacted files

@@                Coverage Diff                 @@
##           releases/2.0.0    #3466      +/-   ##
==================================================
- Coverage           76.20%   76.20%   -0.01%     
==================================================
  Files                 253      253              
  Lines               24232    24232              
==================================================
- Hits                18467    18466       -1     
- Misses               5765     5766       +1     

Flag	Coverage Δ
py310	76.18% <ø> (+0.08%)	⬆️
py311	76.11% <ø> (-0.08%)	⬇️

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