Copy token functionality from node:created to node:unified_date including tests

Closes #3455536

I think we want to pull the values from the unified_date base field.

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• 8f41aaa2 - Apply 3 suggestion(s) to 1 file(s)

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Right makes sense; the reason the tests were even passing is because the default case is created date so that matched, but its unified date to compare.

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• b40d053b - 1 commit from branch project:1.x
• 39f39827 - Merge branch '1.x' into 3455536-tokens-support
• d8f424db - Merge branch '3455536-tokens-support' of...

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• 7aafd1b5 - Ensure tokens cover changing the unified date source field

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merged