Unhide tsdb.out-of-order.time-window and tsdb.out-of-order.cap-max

[yeya24]

Is your proposal related to a problem?

Out of order samples are not marked as experimental anymore in Prometheus.
We can still mark it as experimental feature in Thanos but there is no need to hide them anymore

Describe the solution you'd like

Make these 2 flags not hidden.

Describe alternatives you've considered

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Additional context

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