Adding telemetry for on demand feature views and making existing usage calls async

[adchia]

What this PR does / why we need it:
Adding telemetry for on demand feature views and making existing usage calls async

Tested this locally to ensure the events are logged correctly and that the get_online_features logs only trigger once every 10k requests.

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

NONE

[codecov-commenter]

Codecov Report

Merging #1873 (14f301d) into master (8a49a65) will increase coverage by 0.47%.
The diff coverage is 64.61%.

❗ Current head 14f301d differs from pull request most recent head fc49dfc. Consider uploading reports for the commit fc49dfc to get more accurate results

@@            Coverage Diff             @@
##           master    #1873      +/-   ##
==========================================
+ Coverage   83.96%   84.44%   +0.47%     
==========================================
  Files          95       93       -2     
  Lines        7392     7309      -83     
==========================================
- Hits         6207     6172      -35     
+ Misses       1185     1137      -48     

Flag	Coverage Δ
integrationtests	84.44% <64.61%> (+9.70%)	⬆️
unittests	?

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

Impacted Files	Coverage Δ
sdk/python/feast/usage.py	60.00% <45.23%> (-0.96%)	⬇️
sdk/python/feast/feature_store.py	94.45% <100.00%> (+0.78%)	⬆️
sdk/python/feast/infra/online_stores/datastore.py	92.50% <0.00%> (-0.95%)	⬇️
sdk/python/feast/flags.py
sdk/python/feast/flags_helper.py
sdk/python/feast/errors.py	70.49% <0.00%> (+0.09%)	⬆️
sdk/python/feast/infra/offline_stores/bigquery.py	78.66% <0.00%> (+0.14%)	⬆️
sdk/python/tests/conftest.py	96.36% <0.00%> (+1.05%)	⬆️
... and 2 more

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[achals]

/lgtm

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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• OWNERS [achals,adchia]

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