feat: move HF API components to core integrations

[anakin87]

Related Issues

• part of https://github.com/deepset-ai/haystack-private/issues/365

Proposed Changes:

• move HF API components (generator is excluded)
• also move utilities only used by these components

How did you test it?

CI

Notes for the reviewer

No need to review the code in depth: I basically ported it from Haystack and updated imports

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.

[github-actions]

Coverage report (huggingface_api)

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
integrations/huggingface_api/src/haystack_integrations/components/common/huggingface_api
utils.py					104-109
integrations/huggingface_api/src/haystack_integrations/components/embedders/huggingface_api
document_embedder.py					176-177, 339-343, 368-372
text_embedder.py					140-141, 256, 258
integrations/huggingface_api/src/haystack_integrations/components/generators/huggingface_api/chat
chat_generator.py					187, 419-420, 487, 586-587, 640, 711
Project Total

This report was generated by python-coverage-comment-action