Support adding request data in on demand transforms

[adchia]

What this PR does / why we need it:
Supports adding request data as a dependency in on demand transforms. This validates when if the entity_df or entity_rows don't have the required request data features.

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

NONE

[achals]

Nice! I think we should add some tests to assert proper handling of the error cases, but looks good otherwise.

[codecov-commenter]

Codecov Report

Merging #1851 (3a83dff) into master (1b809a7) will increase coverage by 0.21%.
The diff coverage is 97.46%.

@@            Coverage Diff             @@
##           master    #1851      +/-   ##
==========================================
+ Coverage   84.87%   85.08%   +0.21%     
==========================================
  Files          91       91              
  Lines        6961     7089     +128     
==========================================
+ Hits         5908     6032     +124     
- Misses       1053     1057       +4     

Flag	Coverage Δ
integrationtests	85.01% <97.46%> (+0.21%)	⬆️
unittests	62.66% <35.44%> (-0.54%)	⬇️

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

Impacted Files	Coverage Δ
sdk/python/feast/infra/offline_stores/bigquery.py	81.94% <ø> (ø)
sdk/python/feast/infra/offline_stores/file.py	97.43% <ø> (ø)
sdk/python/feast/infra/offline_stores/redshift.py	90.99% <ø> (ø)
...ts/integration/feature_repos/repo_configuration.py	100.00% <ø> (ø)
sdk/python/feast/data_source.py	61.29% <88.23%> (+4.28%)	⬆️
sdk/python/feast/errors.py	70.79% <100.00%> (+1.63%)	⬆️
sdk/python/feast/feature_store.py	94.34% <100.00%> (+0.58%)	⬆️
sdk/python/feast/on_demand_feature_view.py	89.09% <100.00%> (+3.90%)	⬆️
...tegration/feature_repos/universal/feature_views.py	96.42% <100.00%> (+0.42%)	⬆️
...fline_store/test_universal_historical_retrieval.py	99.18% <100.00%> (+0.05%)	⬆️
... and 2 more

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[achals]

/lgtm

[achals]

nit: I wonder if this method makes sense for this type of data source. We should probably refactor the DataSource interface to make it simpler and introduce a BatchDataSource somewhere in the type hierarchy.

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: achals, adchia

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