[pyupgrade] Make example error out-of-the-box (UP040)

[MeGaGiGaGon]

Summary

Part of #18972

This PR makes non-pep695-type-alias (UP040)'s example error out-of-the-box.

Old example

ListOfInt: TypeAlias = list[int]
PositiveInt = TypeAliasType("PositiveInt", Annotated[int, Gt(0)])

New example

from typing import Annotated, TypeAlias, TypeAliasType
from annotated_types import Gt

ListOfInt: TypeAlias = list[int]
PositiveInt = TypeAliasType("PositiveInt", Annotated[int, Gt(0)])

Imports were also added to the "Use instead" section.

Test Plan

N/A, no functionality/tests affected

[github-actions]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.

[AlexWaygood]

Thanks!

[AlexWaygood]

Let's add the other missing imports too, even if they're not necessary to trigger UP040 out of the box:

Suggested change

	/// from typing import TypeAlias, TypeAliasType
	/// from typing import TypeAlias, TypeAliasType, Annotated
	/// from annotated_types import Gt

And could you also add the missing imports of Annotated and Gt to the Use instead: block below?

[MeGaGiGaGon]

Added