Add timeout to runinference

[damccorm]

Add/expose a timeout in RunInference. This follows the path laid out in https://docs.google.com/document/d/19ves6iv-m_6DFmePJZqYpLm-bCooPu6wQ-Ti6kAl2Jo/edit to add a timeout option to RunInference so that it can be timed out and still perform garbage collection

Part of #32137

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[damccorm]

R: @jrmccluskey

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[jrmccluskey]

Just a few things to clean up and clarify as far as documentation

[codecov]

Codecov Report

Attention: Patch coverage is 88.11881% with 12 lines in your changes missing coverage. Please review.

Project coverage is 78.10%. Comparing base (8601bba) to head (a0dc73c).
Report is 13 commits behind head on master.

Files	Patch %	Lines
sdks/python/apache_beam/ml/inference/base.py	88.11%	12 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #32237      +/-   ##
============================================
+ Coverage     77.96%   78.10%   +0.14%     
  Complexity     3023     3023              
============================================
  Files           750      751       +1     
  Lines         96303    96465     +162     
  Branches       3301     3301              
============================================
+ Hits          75084    75348     +264     
+ Misses        19702    19600     -102     
  Partials       1517     1517              

Flag	Coverage Δ
python	81.62% <88.11%> (+0.18%)	⬆️

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[Abacn]

The added test "test_run_inference_timeout_does_garbage_collection" is flaky:

https://github.com/apache/beam/actions/runs/10589109422/job/29342691220

https://github.com/apache/beam/actions/runs/10543429506/job/29211348150

[damccorm]

Thanks - that test relies on timing, and it seems like its only broken on windows (and very rarely). So I'm not too worried its a real problem, I'll see if I can modify the test though