[BEAM-12028] Add contact information to NotImplementedError

[TheNeuralBit]

We have contact information in pydoc for these operations, but we should also include it in the error message so users know what to do as soon as they run into it. Required plumbing the base type through not_implemented_method.

I also went ahead and fixed some links that I noticed are using the wrong format in their docstrings.

ValidatesRunner compliance status (on master branch)

Lang	ULR	Dataflow	Flink	Samza	Spark	Twister2
Go	---			---		---
Java
Python	---			---		---
XLang				---		---

Examples testing status on various runners

Lang	ULR	Dataflow	Flink	Samza	Spark	Twister2
Go	---	---	---	---	---	---	---
Java	---		---	---	---	---	---
Python	---	---	---	---	---	---	---
XLang	---	---	---	---	---	---	---

Post-Commit SDK/Transform Integration Tests Status (on master branch)

Go	Java	Python

Pre-Commit Tests Status (on master branch)

---	Java	Python	Go	Website	Whitespace	Typescript
Non-portable
Portable	---			---	---	---

See .test-infra/jenkins/README for trigger phrase, status and link of all Jenkins jobs.

GitHub Actions Tests Status (on master branch)

See CI.md for more information about GitHub Actions CI.

[codecov]

Codecov Report

Merging #14967 (7862c54) into master (1b83efb) will decrease coverage by 0.02%.
The diff coverage is 95.23%.

@@            Coverage Diff             @@
##           master   #14967      +/-   ##
==========================================
- Coverage   83.75%   83.72%   -0.03%     
==========================================
  Files         436      438       +2     
  Lines       58492    58809     +317     
==========================================
+ Hits        48989    49240     +251     
- Misses       9503     9569      +66     

Impacted Files	Coverage Δ
sdks/python/apache_beam/dataframe/frame_base.py	90.07% <92.30%> (ø)
sdks/python/apache_beam/dataframe/frames.py	94.19% <100.00%> (ø)
sdks/python/apache_beam/dataframe/io.py	92.09% <100.00%> (ø)
...pache_beam/dataframe/pandas_top_level_functions.py	93.68% <100.00%> (ø)
...ks/python/apache_beam/runners/worker/data_plane.py
.../srcs/sdks/python/apache_beam/internal/gcp/auth.py
...nners/direct/consumer_tracking_pipeline_visitor.py
...y38/build/srcs/sdks/python/apache_beam/pipeline.py
.../python/apache_beam/examples/windowed_wordcount.py
.../gcp/internal/clients/storage/storage_v1_client.py
... and 868 more

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[TheNeuralBit]

Run Python PreCommit

[TheNeuralBit]

Run Python PreCommit

[TheNeuralBit]

Run Python PreCommit

[robertwb]

Should we say not yet supported, or otherwise give an indication that this is subject to change?