docs: add aisample time series forecasting

[lhrotk]

Related Issues/PRs

None

What changes are proposed in this pull request?

Add time series forecasting notebook for aisample under notebooks/community/aisample.

How is this patch tested?

• I have written tests (not required for typo or doc fix) and confirmed the proposed feature/bug-fix/change works.

Does this PR change any dependencies?

• No. You can skip this section.
• Yes. Make sure the dependencies are resolved correctly, and list changes here.

Does this PR add a new feature? If so, have you added samples on website?

• No. You can skip this section.
• Yes. Make sure you have added samples following below steps.

1. Find the corresponding markdown file for your new feature in website/docs/documentation folder.
   Make sure you choose the correct class estimators/transformers and namespace.
2. Follow the pattern in markdown file and add another section for your new API, including pyspark, scala (and .NET potentially) samples.
3. Make sure the DocTable points to correct API link.
4. Navigate to website folder, and run yarn run start to make sure the website renders correctly.
5. Don't forget to add <!--pytest-codeblocks:cont--> before each python code blocks to enable auto-tests for python samples.
6. Make sure the WebsiteSamplesTests job pass in the pipeline.

AB#1928947

[github-actions]

Hey @lhrotk 👋!
Thank you so much for contributing to our repository 🙌.
Someone from SynapseML Team will be reviewing this pull request soon.
We appreciate your patience and contributions 💯!

[mhamilton723]

Thanks for this great PR Cruise, it looks pretty tight! Leaving comments below

1. It looks like there is a few thousand lines of data still in the notebook (see the raw representation) could you please remove this so we can have small diffs that are viewable in UX?
2. Mentioned this to Tan too, if you want we can make this notebook run on all platforms by using the synapseml public blob to host data.

[lhrotk]

Thanks so much for your feedback, Mark. I have deleted redundant lines in notebook metadata and now it is comparable. I will discuss with him on making this notebook available to all platforms.

[mhamilton723]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov-commenter]

Codecov Report

Merging #1614 (8ff0bf5) into master (7b4b0e1) will decrease coverage by 4.89%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1614      +/-   ##
==========================================
- Coverage   83.77%   78.87%   -4.90%     
==========================================
  Files         292      292              
  Lines       15473    15473              
  Branches      752      752              
==========================================
- Hits        12963    12205     -758     
- Misses       2510     3268     +758     

Impacted Files	Coverage Δ
...synapse/ml/cognitive/TextAnalyticsSDKSchemas.scala	0.00% <0.00%> (-81.20%)	⬇️
...e/synapse/ml/cognitive/FormRecognizerSchemas.scala	7.69% <0.00%> (-76.93%)	⬇️
...ure/synapse/ml/cognitive/FormOntologyLearner.scala	14.28% <0.00%> (-73.47%)	⬇️
.../synapse/ml/cognitive/AnomalyDetectorSchemas.scala	33.33% <0.00%> (-66.67%)	⬇️
.../azure/synapse/ml/cognitive/TextAnalyticsSDK.scala	22.37% <0.00%> (-63.64%)	⬇️
...oft/azure/synapse/ml/cognitive/TextAnalytics.scala	31.67% <0.00%> (-54.59%)	⬇️
...ft/azure/synapse/ml/cognitive/TextTranslator.scala	33.08% <0.00%> (-48.13%)	⬇️
...osoft/azure/synapse/ml/core/utils/AsyncUtils.scala	35.00% <0.00%> (-40.00%)	⬇️
.../azure/synapse/ml/cognitive/AnomalyDetection.scala	40.00% <0.00%> (-40.00%)	⬇️
...t/azure/synapse/ml/cognitive/BingImageSearch.scala	57.14% <0.00%> (-32.15%)	⬇️
... and 11 more

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[mhamilton723]

Traceback (most recent call last):
  File "/home/vsts/work/1/s/website/notebookconvert.py", line 65, in <module>
    main()
  File "/home/vsts/work/1/s/website/notebookconvert.py", line 61, in main
    convert_allnotebooks_in_folder(folder, outputdir)
  File "/home/vsts/work/1/s/website/notebookconvert.py", line 44, in convert_allnotebooks_in_folder
    os.mkdir(cur_output_dir)
FileNotFoundError: [Errno 2] No such file or directory: '/home/vsts/work/1/s/website/docs/community/aisamples'

@lhrotk, looks like we need to stop the notebook converter from picking this folder up. You think you have the cycles to try this fix? @serena-ruan will be able to advise on what needs to change here. You can repro this locally with the sbt convertNotebooks command i think

[serena-ruan]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).