[`pyupgrade`] Add `from __future__ import annotations` automatically (`UP006`) (#23260)
## Summary
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part of https://github.com/astral-sh/ruff/issues/19359
## Test Plan
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added tests & snapshots
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Signed-off-by: Bhuminjay <bhuminjaysoni@gmail.com>
Co-authored-by: Brent Westbrook <brentrwestbrook@gmail.com>