Add keypoint detection task with RTMPose

[wonjuleee]

Summary

• Add keypoint detection task
• Add RTMPose-tiny for keypoint detection task
• Performance metric: PCK accuracy for pose estimation

RTMPose-tiny	pck_acc	epoch
coco-small	0.38	59
coco-medium	0.46	32
coco-large	0.77	22

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]

@wonjuleee does this PR target 2.2 milestone?

[kprokofi]

Thank you for your hard work and bringing new task to OTX

[eunwoosh]

Great to see that otx supports new task :) I left some comments. Please take a look.
And it's a new task, so I think it's better to update integration, e2e test and perf test to check this task. Could you update it?

[wonjuleee]

@wonjuleee does this PR target 2.2 milestone?

correct.

[sungchul2]

Thanks for your hard work!
I left some comments and I'd like to suggest to update license and docstring.
And as @kprokofi said and you already know, we are WIP on refactoring and this task also would be better to be aligned with this.

[sungchul2]

@wonjuleee Could you update CHANGELOG as well?

[sybyun]

It looks good. Hi reviewers, could you please approve this PR if you don't have any serious concern or clear suggestions? Because, this is Geti's requirement and planned to be implemented at this OTX version. Thanks.