Hookup pytest-benchmark to online retreival

[achals]

What this PR does / why we need it:

This adds benchmarking capability to our test suite:

-------------------------------------------------------------------------------------------------------------- benchmark: 6 tests --------------------------------------------------------------------------------------------------------------
Name (time in ms)                                                  Min                    Max                  Mean                StdDev                Median                   IQR            Outliers      OPS            Rounds  Iterations
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
test_online_retrieval[Provider: local-Fil-sqlite]               9.1365 (1.0)         452.9673 (19.57)       17.1015 (1.04)        54.0603 (18.97)       10.4445 (1.0)          0.8167 (1.0)           1;3  58.4745 (0.96)         67           1
test_online_retrieval[Provider: local-Fil-redis]               12.5955 (1.38)         23.1421 (1.0)         16.4554 (1.0)          2.8490 (1.0)         15.0211 (1.44)         4.6989 (5.75)         20;0  60.7702 (1.0)          68           1
test_online_retrieval[Provider: gcp-BigQuery-redis]            13.7807 (1.51)         34.5902 (1.49)        20.4617 (1.24)         7.3842 (2.59)        15.0223 (1.44)        11.9083 (14.58)        13;0  48.8717 (0.80)         58           1
test_online_retrieval[Provider: aws-Redshif-redis]             14.2859 (1.56)         33.7554 (1.46)        21.1342 (1.28)         7.7164 (2.71)        15.4758 (1.48)        15.1340 (18.53)         8;0  47.3167 (0.78)         31           1
test_online_retrieval[Provider: aws-Redshif-dynamodb]         750.5459 (82.15)       838.0375 (36.21)      800.4803 (48.65)       34.4636 (12.10)      813.1550 (77.86)       49.6590 (60.81)         2;0   1.2492 (0.02)          5           1
test_online_retrieval[Provider: gcp-BigQuery-datastore]     2,992.7181 (327.56)   14,693.6830 (634.93)   5,414.2530 (329.03)   5,187.9380 (>1000.0)  3,160.4443 (302.60)   3,024.1152 (>1000.0)       1;1   0.1847 (0.00)          5           1

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

none

[codecov-commenter]

Codecov Report

Merging #1858 (87d8f81) into master (77cdc0e) will decrease coverage by 0.54%.
The diff coverage is 51.42%.

@@            Coverage Diff             @@
##           master    #1858      +/-   ##
==========================================
- Coverage   85.13%   84.58%   -0.55%     
==========================================
  Files          92       93       +1     
  Lines        7163     7273     +110     
==========================================
+ Hits         6098     6152      +54     
- Misses       1065     1121      +56     

Flag	Coverage Δ
integrationtests	84.55% <51.42%> (-0.53%)	⬇️
unittests	62.42% <51.42%> (-0.52%)	⬇️

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

Impacted Files	Coverage Δ
...marks/test_benchmark_universal_online_retrieval.py	32.00% <32.00%> (ø)
sdk/python/tests/conftest.py	100.00% <100.00%> (ø)
...ts/integration/feature_repos/repo_configuration.py	100.00% <100.00%> (ø)
sdk/python/feast/repo_config.py	82.38% <0.00%> (-10.64%)	⬇️
sdk/python/feast/infra/offline_stores/redshift.py	84.87% <0.00%> (-6.12%)	⬇️
sdk/python/feast/infra/utils/aws_utils.py	83.03% <0.00%> (-5.43%)	⬇️
sdk/python/feast/infra/offline_stores/bigquery.py	78.66% <0.00%> (-3.28%)	⬇️
sdk/python/feast/infra/online_stores/helpers.py	86.20% <0.00%> (-0.46%)	⬇️
sdk/python/feast/errors.py	70.49% <0.00%> (-0.31%)	⬇️
... and 6 more

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[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[woop]

/lgtm