Add missing waitForMigrations for workers

[grjones]

Add missing waitForMigrations.enabled flag and associated logic for workers section in helm chart. All other components have this flag.

closes: #31624

[boring-cyborg]

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[jedcunningham]

Good find. Can you add a test like this in here?

[grjones]

Good find. Can you add a test like this in here?

Sure thing. Added. Let me know if there is anything else I can do.

[boring-cyborg]

Awesome work, congrats on your first merged pull request! You are invited to check our Issue Tracker for additional contributions.