Add AWS documentation (DynamoDB, Redshift)

[tsotnet]

Signed-off-by: Tsotne Tabidze [email protected]

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

Document AWS Provider (including DynamoDB & Redshift)

[codecov-commenter]

Codecov Report

Merging #1733 (8a0937d) into master (bf557bc) will decrease coverage by 0.60%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1733      +/-   ##
==========================================
- Coverage   79.06%   78.45%   -0.61%     
==========================================
  Files          80       80              
  Lines        6849     7046     +197     
==========================================
+ Hits         5415     5528     +113     
- Misses       1434     1518      +84     

Flag	Coverage Δ
integrationtests	79.00% <ø> (+0.01%)	⬆️
unittests	61.75% <ø> (ø)

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

Impacted Files	Coverage Δ
...gration/offline_store/test_historical_retrieval.py	80.54% <0.00%> (-18.40%)	⬇️
...n/tests/integration/registration/test_inference.py	84.44% <0.00%> (-15.56%)	⬇️
sdk/python/feast/feature_view.py	88.54% <0.00%> (-0.44%)	⬇️
sdk/python/feast/infra/offline_stores/file.py	97.14% <0.00%> (+0.05%)	⬆️

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[woop]

/lgtm

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tsotnet, woop

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[woop]

Assuming TODOs will come in another PR.