Enabling HA and chaosduck for IMC yields failures

[mattmoor]

In the context of this PR I tried enabling HA of the imc-controller process and "chaos".

It resulted in these failures during e2e: https://prow.knative.dev/view/gcs/knative-prow/pr-logs/pull/knative_eventing/3565/pull-knative-eventing-integration-tests/1283163740094599169

To reproduce things, sync past #3565 landing (or pull in the PR) and change:

1. ./test/config/chaosduck.yaml: Comment/Remove the -disable=imc-controller and -disable=imc-dispatcher flags.
2. ./test/e2e-common.sh: Uncomment the line scale_controlplane imc-controller imc-dispatcher.

[mattmoor]

Opened #3598 to start debugging this.

[github-actions]

This issue is stale because it has been open for 90 days with no
activity. It will automatically close after 30 more days of
inactivity. Reopen the issue with /reopen. Mark the issue as
fresh by adding the comment /remove-lifecycle stale.

[mattmoor]

/lifecycle frozen

@vaikas worth trying this again after your recent changes?

[vaikas]

@mattmoor yeah, thought about that just haven't gotten around to it yet :)

[slinkydeveloper]

AFAIK this one was solved with #4675, i'm going to close it, reopen if you need it

[pierDipi]

No, #4579.

/reopen

[knative-prow-robot]

@pierDipi: Reopened this issue.

In response to this:

No, #4579.

/reopen

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