Remove auth restriction to collect fees from fee collector

[kerber0x]

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Improvement description

As of now only the fee collector contract and its owner can trigger the fee collection, i.e. ExecuteMsg::CollectFees. There's no need for that, it should be removed so anybody can do it.

See:

contracts/liquidity_hub/fee_collector/src/commands.rs:30

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Additional context

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[kerber0x]

done