For satefulset kafka dispatchers we ignore the replica

[matzew]

Fixes #

Proposed Changes

• add statefulset kafka dispatcher to ignore replica list (kafka controller them).
• they are not HPAs, hence just the update on the HPA (or custom autoscaler func)
• added test for kafka source

Release Note

statefulset kafka dispatcher have a managed scaling via kafka controller, hence we ignore replica on those 

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.

Project coverage is 66.31%. Comparing base (a674567) to head (ce615f3).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/reconciler/common/workload_override.go	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1889      +/-   ##
==========================================
- Coverage   66.36%   66.31%   -0.05%     
==========================================
  Files          53       53              
  Lines        2081     2084       +3     
==========================================
+ Hits         1381     1382       +1     
- Misses        586      587       +1     
- Partials      114      115       +1     

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[matzew]

/cherry-pick release-1.14

[knative-prow-robot]

@matzew: once the present PR merges, I will cherry-pick it on top of release-1.14 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.14

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[matzew]

/cherry-pick release-1.15

[knative-prow-robot]

@matzew: once the present PR merges, I will cherry-pick it on top of release-1.15 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.15

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[pierDipi]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[knative-prow-robot]

@matzew: new pull request created: #1890

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]

@matzew: new pull request created: #1891

In response to this:

/cherry-pick release-1.15

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.