Bug fix in Semantic Segmentation + enable DINOV2 export in ONNX

[kprokofi]

Summary

1. Only without registers DINOV2 can be exported to ONNX. The accuracy difference is insignificant
2. Bug fix with ignore index in labels pre-filtering. Bug fix with overriding default values in segmentation models

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

Attention: Patch coverage is 90.90909% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 83.24%. Comparing base (ec0f906) to head (b88be34).
Report is 4 commits behind head on develop.

Files	Patch %	Lines
src/otx/core/data/pre_filtering.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3569      +/-   ##
===========================================
+ Coverage    83.14%   83.24%   +0.09%     
===========================================
  Files          254      255       +1     
  Lines        24955    25191     +236     
===========================================
+ Hits         20749    20969     +220     
- Misses        4206     4222      +16     

Flag	Coverage Δ
py310	83.22% <90.90%> (+0.09%)	⬆️
py311	82.96% <90.90%> (+0.41%)	⬆️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.