test: verify that scaledobjects have no authenticationref when it is empty

[Cali0707]

As a follow up on #3939 this PR adds a regression test to prevent this issue from coming back

Proposed Changes

• Verify that the scaledobject created by a KafkaSource's consumergroup does not have an authentication ref unless it needs to

[Cali0707]

/cc @pierDipi @creydr @maschmid

[Cali0707]

@pierDipi should we backport this along with the fixes or is it fine for this test to only be in main for now?

[pierDipi]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Cali0707, pierDipi

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[pierDipi]

/test reconciler-tests-namespaced-broker

[pierDipi]

Yes, @Cali0707

[Cali0707]

/cherry-pick release-1.14

[Cali0707]

/cherry-pick release-1.13

[knative-prow-robot]

@Cali0707: new pull request created: #3949

In response to this:

/cherry-pick release-1.14

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[knative-prow-robot]

@Cali0707: #3944 failed to apply on top of branch "release-1.13":

Applying: test: verify that scaledobjects have no authenticationref when it is empty
Using index info to reconstruct a base tree...
A	test/rekt/features/keda_scaling.go
Falling back to patching base and 3-way merge...
CONFLICT (modify/delete): test/rekt/features/keda_scaling.go deleted in HEAD and modified in test: verify that scaledobjects have no authenticationref when it is empty. Version test: verify that scaledobjects have no authenticationref when it is empty of test/rekt/features/keda_scaling.go left in tree.
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 test: verify that scaledobjects have no authenticationref when it is empty
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-1.13

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.