[unit tests] reconciliation removal of keda objects

[converge]

Problem
this PR #3676 is missing unit tests. I would like to create them on a separated PR.

[Cali0707]

/triage accepted
/assign @converge

Thanks for volunteering to work on this on slack @converge , feel free to unassign if you change your mind!

[Cali0707]

I believe this is resolved now, feel free to re-open if for some reason it isn't
/close

[knative-prow]

@Cali0707: Closing this issue.

In response to this:

I believe this is resolved now, feel free to re-open if for some reason it isn't
/close

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