Update FindRollbackStage logic to use pipeline stage rollback value

[khanhtc1202]

What this PR does:

We added rollback to pipelineStage model recently, so I updated the FindRollbackStage logic to depend on that field too

Why we need it:

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 12.50000% with 21 lines in your changes missing coverage. Please review.

Project coverage is 25.31%. Comparing base (7676161) to head (242b995). Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/app/pipedv1/controller/scheduler.go	0.00%	13 Missing :warning:
pkg/app/pipedv1/controller/controller.go	0.00%	8 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #5313 +/- ## ========================================== + Coverage 25.27% 25.31% +0.03% ========================================== Files 444 444 Lines 47503 47476 -27 ========================================== + Hits 12006 12017 +11 + Misses 34555 34517 -38 Partials 942 942 ```

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