Split apply total parse repo

[mickey-liu]

What this PR does / why we need it:
Need a way to pass a user-defined repo to the apply_total method. Added a new method which apply_total will now call that takes a RepoContents arg

Which issue(s) this PR fixes:
Fixes #2128

Does this PR introduce a user-facing change?:

1. Added functionality
2. No User action required
3. added method: apply_total_with_repo_instance()
4. See #2128 

[mavysavydav]

/ok-to-test

[codecov-commenter]

Codecov Report

Merging #2226 (59d3986) into master (2a95629) will decrease coverage by 0.05%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master    #2226      +/-   ##
==========================================
- Coverage   84.98%   84.92%   -0.06%     
==========================================
  Files         105      105              
  Lines        8450     8498      +48     
==========================================
+ Hits         7181     7217      +36     
- Misses       1269     1281      +12     

Flag	Coverage Δ
integrationtests	73.09% <50.00%> (-0.27%)	⬇️
unittests	59.71% <50.00%> (-0.13%)	⬇️

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

Impacted Files	Coverage Δ
sdk/python/feast/repo_operations.py	48.38% <50.00%> (+0.01%)	⬆️
sdk/python/feast/online_response.py	77.77% <0.00%> (-16.96%)	⬇️
sdk/python/feast/proto_json.py	92.42% <0.00%> (-3.04%)	⬇️
sdk/python/feast/feature_store.py	89.84% <0.00%> (-1.75%)	⬇️
sdk/python/tests/conftest.py	92.07% <0.00%> (-1.18%)	⬇️
.../integration/online_store/test_universal_online.py	97.23% <0.00%> (-0.91%)	⬇️
...ts/integration/feature_repos/repo_configuration.py	94.23% <0.00%> (-0.34%)	⬇️
sdk/python/tests/unit/test_proto_json.py	100.00% <0.00%> (ø)
...n/tests/integration/online_store/test_e2e_local.py	100.00% <0.00%> (ø)
sdk/python/feast/feature_server.py	31.57% <0.00%> (+0.80%)	⬆️
... and 2 more

---

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[felixwang9817]

hey @mickey-liu, this PR looks good to me! would you mind fixing the lint errors and pushing again? you can fix the lint errors with make format-python and make lint-python - see this page for more details

[mickey-liu]

@felixwang9817 thanks for the review. I just updated the PR with the lint fixes.

[felixwang9817]

/lgtm

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: felixwang9817, mickey-liu

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