feat(query): DATE_ADD Functions to support week as a unit

[TracyZYJ]

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Summary

date_add support week as unit.

SELECT DATE_ADD('week', 1, TODAY())=DATE_ADD('day', 7, TODAY())

• fixes: Feature: Date Functions to support week as a unit #16402

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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This change is 

[TCeason]

LGTM. Please review this pr @b41sh