Correct cleanup after usage e2e tests

[pyalex]

Signed-off-by: pyalex [email protected]

What this PR does / why we need it:

This PR fixes flaky e2e tests for usage module.

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

NONE

[codecov-commenter]

Codecov Report

Merging #2015 (7dabb85) into master (3ee88f4) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2015   +/-   ##
=======================================
  Coverage   83.21%   83.22%           
=======================================
  Files         103      103           
  Lines        8417     8421    +4     
=======================================
+ Hits         7004     7008    +4     
  Misses       1413     1413           

Flag	Coverage Δ
integrationtests	74.38% <100.00%> (+0.01%)	⬆️
unittests	60.34% <57.14%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
sdk/python/tests/integration/e2e/test_usage_e2e.py	100.00% <100.00%> (ø)

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[felixwang9817]

/lgtm

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: felixwang9817, pyalex

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[felixwang9817]

/kind bug

[felixwang9817]

/lgtm