Use model_api action classification model wrapper class

[eunwoosh]

Summary

Currently, OTX uses own model_api model wrapper for action classification task.
It's implemented at model_api 0.2.1, so make OTX use it and remove unnecessary code.

Integration test result

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

[sovrasov]

@eunwoosh this PR is not required for 2.1, so please retarget back to develop

[eunwoosh]

@eunwoosh this PR is not required for 2.1, so please retarget back to develop

Ok I changed target branch to develop

[sovrasov]

@eunwoosh please apply changes from this PR: #3703