[go_router] Sets correct reverseTransitionDuration on NoTransitionPage (#123368)

[josh-burton]

Sets the reverseTransitionDuration of NoTransitionPage to 1 microsecond to match the transition duration (and to ensure there is an instant reverse transition).

fixes https://github.com/flutter/flutter/issues/123368

List which issues are fixed by this PR. You must list at least one issue.

• https://github.com/flutter/flutter/issues/123368

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