adding istio annotation

[vayyappaneni]

Fixes #3532
backport #3534

Proposed Changes

• Fixing issue where jobs do not complete on istio enabled cluster

Release Note

Fixes issue where migration jobs would fail on Istio cluster with auto-inject enabled

[knative-prow-robot]

Hi @vayyappaneni. Thanks for your PR.

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[vayyappaneni]

/assign @vaikas

[AceHack]

/ok-to-test

[vaikas]

/lgtm
/approve

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: vaikas, vayyappaneni

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