Compute property-level diffs for repo objects

[achals]

Signed-off-by: Achal Shah

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

`feast plan` and `feast apply` output produces property-level diffs for objects changed in-place.

[achals]

cc @judahrand since you asked about this erlier

[codecov-commenter]

Codecov Report

Merging #2156 (0e4eac8) into master (ce243a4) will decrease coverage by 0.21%.
The diff coverage is 82.35%.

@@            Coverage Diff             @@
##           master    #2156      +/-   ##
==========================================
- Coverage   84.64%   84.42%   -0.22%     
==========================================
  Files         101      101              
  Lines        8037     8098      +61     
==========================================
+ Hits         6803     6837      +34     
- Misses       1234     1261      +27     

Flag	Coverage Δ
integrationtests	74.36% <82.35%> (-0.48%)	⬇️
unittests	58.80% <82.35%> (-0.08%)	⬇️

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	48.37% <0.00%> (-0.69%)	⬇️
sdk/python/feast/diff/FcoDiff.py	90.47% <100.00%> (+2.47%)	⬆️
sdk/python/feast/registry.py	87.24% <100.00%> (+0.04%)	⬆️
sdk/python/feast/infra/online_stores/datastore.py	80.11% <0.00%> (-11.23%)	⬇️
sdk/python/feast/infra/utils/aws_utils.py	84.78% <0.00%> (-0.73%)	⬇️

---

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 ce243a4...0e4eac8. 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