Refactor tag methods to infer created, deleted, and kept repo objects

[achals]

Signed-off-by: Achal Shah achals@gmail.com

What this PR does / why we need it:

This is a first PR to support the feast plan command, as it applies to FCOs. It also adds a diff_betewen method for Registry objects, which is not complete in its implementation at this point.

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

none

[felixwang9817]

nit: regsitry is mispelled

[felixwang9817]

q: why do we need a from_proto for the registry? I thought the registry contents would always be persisted by the registry store

to clarify, even when we want to compare two registries, we will be comparing protos; I don't think we'll need to reconstruct a registry from a proto?

[achals]

yeah fair, I can change this to operate on the protos themselves. I think I misunderstood earlier

[codecov-commenter]

Codecov Report

Merging #2142 (2de2d29) into master (5560caf) will increase coverage by 25.45%.
The diff coverage is 56.43%.

@@             Coverage Diff             @@
##           master    #2142       +/-   ##
===========================================
+ Coverage   57.88%   83.34%   +25.45%     
===========================================
  Files         101      102        +1     
  Lines        8176     8213       +37     
===========================================
+ Hits         4733     6845     +2112     
+ Misses       3443     1368     -2075     

Flag	Coverage Δ
integrationtests	73.54% <55.10%> (?)
unittests	58.11% <56.43%> (+0.22%)	⬆️

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	48.41% <19.23%> (+4.23%)	⬆️
sdk/python/feast/registry.py	78.86% <59.09%> (+11.53%)	⬆️
sdk/python/feast/diff/FcoDiff.py	71.42% <71.42%> (ø)
sdk/python/feast/feature_store.py	90.26% <100.00%> (+20.03%)	⬆️
sdk/python/feast/feature_view.py	89.43% <100.00%> (+12.29%)	⬆️
sdk/python/feast/data_source.py	61.29% <0.00%> (+0.40%)	⬆️
sdk/python/feast/online_response.py	87.71% <0.00%> (+1.75%)	⬆️
sdk/python/feast/infra/online_stores/sqlite.py	96.77% <0.00%> (+2.15%)	⬆️
sdk/python/feast/feature.py	72.72% <0.00%> (+3.03%)	⬆️
sdk/python/feast/errors.py	70.00% <0.00%> (+5.00%)	⬆️
... and 54 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5560caf...2de2d29. Read the comment docs.

[felixwang9817]

/lgtm

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [achals,felixwang9817]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment