Add v1.34 Comms shadows to milestone-maintainers and release-team-comms

[aibarbetta]

Adds v1.34 Comms shadows to:

• milestone-maintainers
• release-team-comms

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: aibarbetta
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[k8s-ci-robot]

@aibarbetta: 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
pull-org-test-all	752ba3f	link	true	/test pull-org-test-all

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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