Fix list feature format for BigQuery offline datasources.

[judahrand]

What this PR does / why we need it:
Should have been using this option from the start but the docs on it are very lacking. Took me an hour or two to find it. This should make BQ behave like the other data store with pyarrow lists instead of the weird {list: {item: value}}.

Some concerns about this being incompatible with already existing tables? Though I think really this is important as the transformation after the fact is slow and this it the 'right' fix.

Which issue(s) this PR fixes:

Fixes #1839

Does this PR introduce a user-facing change?:

Fix list feature format for BigQuery offline datasources. 

[feast-ci-bot]

Hi @judahrand. Thanks for your PR.

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[adchia]

/ok-to-test

[codecov-commenter]

Codecov Report

Merging #1889 (f90aa17) into master (1dada6a) will increase coverage by 0.00%.
The diff coverage is 85.29%.

@@           Coverage Diff           @@
##           master    #1889   +/-   ##
=======================================
  Coverage   83.73%   83.74%           
=======================================
  Files          96       96           
  Lines        7353     7363   +10     
=======================================
+ Hits         6157     6166    +9     
- Misses       1196     1197    +1     

Flag	Coverage Δ
integrationtests	74.47% <85.29%> (+0.02%)	⬆️
unittests	62.29% <32.35%> (-0.01%)	⬇️

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	97.28% <75.00%> (+0.49%)	⬆️
sdk/python/feast/infra/offline_stores/bigquery.py	79.26% <78.94%> (+0.74%)	⬆️
sdk/python/feast/type_map.py	81.89% <100.00%> (+0.64%)	⬆️
...n/feature_repos/universal/data_sources/bigquery.py	97.61% <100.00%> (-0.06%)	⬇️
...s/integration/registration/test_universal_types.py	100.00% <100.00%> (ø)
sdk/python/tests/utils/data_source_utils.py	100.00% <100.00%> (ø)

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[judahrand]

Not quite there 😢

[judahrand]

All tests passing.

[adchia]

/lgtm

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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