Improve aws lambda deployment (logging, idempotency, etc)

[tsotnet]

Signed-off-by: Tsotne Tabidze [email protected]

What this PR does / why we need it: This PR fixes or improves a couple of things

1. Docker push command was failing for me without any errors in Python, which took quite some time to debug. With this change I make it possible to print out docker command outputs. This is logged on the debug level, so you'll need to run it with --log-level=debug, for example feast --log-level=debug apply. Also, looks like log-level flag was not working correctly, so I also fixed that.
2. We shouldn't try docker image download/upload if the image is already in ECR. So I made a change that first checks this image in ECR and only runs the docker logic if necessary. This also means that from the 2nd feast apply, users won't need to have docker daemon running (which was required on each apply before).

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

NONE

[codecov-commenter]

Codecov Report

Merging #1985 (b110244) into master (6728f2a) will increase coverage by 0.08%.
The diff coverage is 10.14%.

@@            Coverage Diff             @@
##           master    #1985      +/-   ##
==========================================
+ Coverage   82.07%   82.15%   +0.08%     
==========================================
  Files         100      101       +1     
  Lines        7987     8074      +87     
==========================================
+ Hits         6555     6633      +78     
- Misses       1432     1441       +9     

Flag	Coverage Δ
integrationtests	74.62% <10.14%> (+0.16%)	⬆️
unittests	58.94% <10.14%> (-0.35%)	⬇️

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

Impacted Files	Coverage Δ
sdk/python/feast/cli.py	38.21% <0.00%> (-0.30%)	⬇️
sdk/python/feast/infra/aws.py	39.26% <9.37%> (-0.41%)	⬇️
sdk/python/feast/constants.py	100.00% <100.00%> (ø)
sdk/python/tests/utils/online_read_write_test.py	100.00% <0.00%> (ø)
sdk/python/feast/infra/offline_stores/bigquery.py	80.00% <0.00%> (ø)
...n/feast/infra/feature_servers/aws_lambda/config.py	100.00% <0.00%> (ø)
sdk/python/feast/infra/provider.py	89.43% <0.00%> (+0.08%)	⬆️
.../integration/online_store/test_universal_online.py	99.46% <0.00%> (+0.13%)	⬆️
... and 3 more

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[felixwang9817]

looks great overall, just one quick comment

[adchia]

will leave @felixwang9817 to give the lgtm, but the code lgtm

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: adchia, felixwang9817, tsotnet

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[felixwang9817]

/lgtm