chore: Try to remove Liquidity order type from orderbook

[sunce86]

Background

@m-lord-renkse suggested to remove Liquidity orders from orderbook here: #3059 (comment)

We should investigate whether this is possible and check if we are using Liquidity orders anywhere else. Would it be possible to convert Liquidity orders into Limit orders to remove the backward compatibility issue.

[github-actions]

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