chore: Add CODEOWNERS file to automate more code reviews

[adchia]

This is pending all the people mentioned in this are members of the Feast community and have write access

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

[codecov-commenter]

Codecov Report

Base: 67.02% // Head: 75.69% // Increases project coverage by +8.67% 🎉

Coverage data is based on head (4fc632d) compared to base (782c759).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3192      +/-   ##
==========================================
+ Coverage   67.02%   75.69%   +8.67%     
==========================================
  Files         175      211      +36     
  Lines       15940    17923    +1983     
==========================================
+ Hits        10683    13567    +2884     
+ Misses       5257     4356     -901     

Flag	Coverage Δ
integrationtests	66.85% <ø> (-0.17%)	⬇️
unittests	57.90% <ø> (?)

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

Impacted Files	Coverage Δ
...on/feast/infra/materialization/snowflake_engine.py	92.09% <0.00%> (-0.47%)	⬇️
.../contrib/athena_offline_store/tests/data_source.py	46.66% <0.00%> (ø)
...s/contrib/mssql_offline_store/tests/data_source.py	46.93% <0.00%> (ø)
...ffline_stores/contrib/spark_offline_store/spark.py	7.72% <0.00%> (ø)
.../online_stores/contrib/hbase_online_store/hbase.py	37.25% <0.00%> (ø)
sdk/python/feast/loaders/yaml.py	18.18% <0.00%> (ø)
...ffline_stores/contrib/athena_repo_configuration.py	100.00% <0.00%> (ø)
...ine_stores/contrib/cassandra_repo_configuration.py	100.00% <0.00%> (ø)
...tion/feature_repos/universal/online_store/hbase.py	50.00% <0.00%> (ø)
.../online_stores/contrib/hbase_repo_configuration.py	100.00% <0.00%> (ø)
... and 100 more

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[kevjumba]

/lgtm

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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• OWNERS [adchia,kevjumba]

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