Example of Online Clustering

[shub-kris]

This PR aims to illustrates an example of performing online clustering using Stateful Processing and RunInference.

The entire implementation is divided into two different pipelines:

1. write_data_to_pubsub_pipeline pushes data to PubSub
2. clustering_pipeline reads data from PubSub and does online clustering

---

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[shub-kris]

R: @andyxiexu @damccorm

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Codecov Report

Merging #23289 (de6b36d) into master (5520fe0) will decrease coverage by 0.01%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #23289      +/-   ##
==========================================
- Coverage   73.45%   73.44%   -0.02%     
==========================================
  Files         718      718              
  Lines       95528    95558      +30     
==========================================
+ Hits        70171    70180       +9     
- Misses      24061    24082      +21     
  Partials     1296     1296              

Flag	Coverage Δ
python	83.16% <ø> (-0.03%)	:arrow_down:

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

Impacted Files	Coverage Δ
...s/interactive/dataproc/dataproc_cluster_manager.py	71.72% <0.00%> (-5.70%)	:arrow_down:
sdks/python/apache_beam/internal/gcp/auth.py	73.33% <0.00%> (-5.34%)	:arrow_down:
...pache_beam/runners/interactive/interactive_beam.py	81.70% <0.00%> (-0.64%)	:arrow_down:
sdks/python/apache_beam/runners/direct/executor.py	96.46% <0.00%> (-0.55%)	:arrow_down:
...hon/apache_beam/runners/worker/bundle_processor.py	93.30% <0.00%> (-0.25%)	:arrow_down:
sdks/python/apache_beam/transforms/util.py	96.06% <0.00%> (ø)
...dks/python/apache_beam/options/pipeline_options.py	94.36% <0.00%> (+0.02%)	:arrow_up:
...ks/python/apache_beam/runners/worker/sdk_worker.py	89.09% <0.00%> (+0.15%)	:arrow_up:
...eam/runners/interactive/interactive_environment.py	92.02% <0.00%> (+0.30%)	:arrow_up:
...che_beam/runners/interactive/interactive_runner.py	91.77% <0.00%> (+0.38%)	:arrow_up:

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[shub-kris]

@damccorm linting and formatting fixed