fix: undo referenced object for workloadRef rollout

[huikang]

• rollback by patching the referenceed object, e.g., deployment, replicaset
• unit test is added

close #1254

Signed-off-by: Hui Kang [email protected]

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this is a chore.
• The title of the PR is (a) conventional, (b) states what changed, and (c) suffixes the related issues number. E.g. "fix(controller): Updates such and such. Fixes #1234".
• I've signed my commits with DCO
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My builds are green. Try syncing with master if they are not.
• My organization is added to USERS.md.

[codecov]

Codecov Report

Merging #1275 (d7df29f) into master (fe4bb1b) will decrease coverage by 0.05%.
The diff coverage is 68.18%.

@@            Coverage Diff             @@
##           master    #1275      +/-   ##
==========================================
- Coverage   81.35%   81.30%   -0.06%     
==========================================
  Files         106      106              
  Lines        9597     9618      +21     
==========================================
+ Hits         7808     7820      +12     
- Misses       1260     1268       +8     
- Partials      529      530       +1     

Impacted Files	Coverage Δ
pkg/kubectl-argo-rollouts/cmd/undo/undo.go	74.34% <68.18%> (-0.47%)	⬇️
rollout/controller.go	77.57% <0.00%> (-0.78%)	⬇️

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
6.4% Duplication

[jessesuen]

Thank you!