[Python] Hugging Face pipeline support

[riteshghorse]

This PR adds Hugging Face pipeline support to RunInference by adding a new model handler for it. Build on top of #26632

Example Job with Question Answering Pipeline on Dataflow

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[codecov]

Codecov Report

Merging #27399 (7db987b) into master (1526263) will decrease coverage by 0.26%.
Report is 117 commits behind head on master.
The diff coverage is 2.42%.

@@            Coverage Diff             @@
##           master   #27399      +/-   ##
==========================================
- Coverage   71.09%   70.84%   -0.26%     
==========================================
  Files         859      862       +3     
  Lines      104555   104939     +384     
==========================================
+ Hits        74338    74347       +9     
- Misses      28660    29035     +375     
  Partials     1557     1557              

Flag	Coverage Δ
python	79.85% <2.42%> (-0.44%)	⬇️

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

Files Changed	Coverage Δ
...amples/inference/huggingface_question_answering.py	0.00% <0.00%> (ø)
.../apache_beam/ml/inference/huggingface_inference.py	0.00% <0.00%> (ø)
...xamples/inference/huggingface_language_modeling.py	13.23% <13.23%> (ø)

... and 16 files with indirect coverage changes

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[riteshghorse]

Run Python 3.8 PostCommit

[riteshghorse]

hugging face integration tests passed on 3.8 PostCommit

[riteshghorse]

Run Python 3.8 PostCommit

[riteshghorse]

PTAL, ready for review. Hugging Face integration tests passed. Some other tests unrelated to this PR are failing. Opened #27734

[riteshghorse]

Run Python 3.8 PostCommit

[riteshghorse]

assign to next reviewer

[riteshghorse]

R: @damccorm

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control

[damccorm]

Left some comments, but the core pieces look good to me

[damccorm]

Run Python 3.8 PostCommit

[damccorm]

LGTM once all suites pass

[riteshghorse]

Tests passed but not reflected here. Opened #27808 for the failing PreCommits. It is not related to this change.

Merging this PR!

[liferoad]

Can you resolve my comments?

[riteshghorse]

I've added the enum you suggested. Are there any comments you didn't publish yet accidentally?

[liferoad]

Interesting. I probably forgot to submit them. Sorry about that.

[riteshghorse]

Thought so! I wanted to get this in for 2.50 so Danny reviewed it as you were OOO.

Some of your comments are already addressed in later commits. I'll send a short PR for rest of them to you.

[liferoad]

Thanks, feel free to resolve my comments.