Bump Serving to version 1.6

[skonto]

• The usual as in Bump Serving to v1.5 #1732.

[skonto]

cc @nak3

  Warning  Failed          13m (x4 over 15m)     kubelet            Error: ErrImagePull
  Normal   BackOff         4m53s (x44 over 15m)  kubelet            Back-off pulling image "registry.ci.openshift.org/openshift/knative-v1.6.0:kourier"

[skonto]

/retest

[nak3]

LGTM except for the eventing test failing...

[skonto]

For the eventing test a fix is coming.

[nak3]

/lgtm
/hold

Thank you. Please feel free to unhold if we don't need to wait for the Eventing fix.

[skonto]

#1811 is merged will rebase

[nak3]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: nak3, skonto

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[skonto]

/retest

[openshift-ci]

@skonto: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/4.11-upgrade-tests-aws-ocp-411	86fcc56	link	false	/test 4.11-upgrade-tests-aws-ocp-411

Full PR test history. Your PR dashboard.

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[skonto]

operator tests:

    - message: 'failed to populate resolver cache from source serverless-operator/openshift-marketplace:
        failed to list bundles: rpc error: code = Unavailable desc = connection error:
        desc = "transport: Error while dialing dial tcp 172.30.227.49:50051: connect:

upgrade tests fail due to KafkaSinkSourceContinualTest.

[skonto]

/test 4.11-operator-e2e-aws-ocp-411

[skonto]

/test 4.11-upgrade-tests-aws-ocp-411