chore: Update liquidation-bot to p23, add support for multiple loans

[kovipu]

Summary of Changes

• Liquidation bot
  • Update packages
  • Change data to the new multi loan format
  • Update reading events to work with p23
  • Update the liquidate API to match loan_manager
• Scripts
  • Allow mock_oracle & set-price to work with Testnet

Considerations

Tästä tuli taas tämmönen mergele...

Related Issue

Please include a link to the relevant issue for context.

Author checklist

2. Does your pull request change contract endpoint?

• Yes, changes in loan_manager
  • Test was added in loan_manager.rs
• Yes, changes in loan_pool
  • Test was added in loan_pool.rs
• No

3. Does your pull request demand a new deployment of contracts

• Yes
• No

[Teolhyn]

Great stuff! There's an issue with the liquidation that is unrelated to your changes, but it should be fixed. I proposed a working fix in the comments. Not sure if it was caused by loose sequence rules in standalone network (then my bad :)) or if something changed in soroban client and how it handles sequence bumping.