feat: streaming_callback as run param from HF generators

[tstadel]

Related Issues

• streaming_callback run param should be supported in a unified way throughout haystack main package. So far only OpenAIGenerator and AzureOpenAIGenerator support the run param. HuggingFaceAPIGenerator and HuggingFaceLocalGenerator lack this kind of support.

Proposed Changes:

• add streaming_callback run param to HuggingFaceAPIGenerator and HuggingFaceLocalGenerator

How did you test it?

Notes for the reviewer

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:.
• I documented my code
• I ran pre-commit hooks and fixed any issue

[coveralls]

Pull Request Test Coverage Report for Build 11575548673

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.001%) to 90.549%

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Files with Coverage Reduction	New Missed Lines	%
components/generators/hugging_face_api.py	1	96.1%
components/generators/hugging_face_local.py	3	91.67%
<!--	Total:	4		-->

Totals
Change from base Build 11573735102:	0.001%
Covered Lines:	7559
Relevant Lines:	8348

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💛 - Coveralls