Handle multiple data providers

[IAvecilla]

• Adds redundancy in data providers, you can now specify more than one in the config file as backups and they will be used in case the first one defined does not work.
• In the case of an error when downloading from a data provider; first it will attempt retry a few times, afterwards it will switch to the next defined data provider. Next time it downloads it will remember the last working data provider.
• Overall the logic changes are not too complex but this Introduces breaking changes to the config file formats
• You can also now define "failing" Dummy data providers which are just used for testing and will always return error, used to test this.
• Adds a new decentralized integration test which tests the main functionality in this PR.

Too avoid getting the stack overflow in the Solana transaction, the updates on the data providers are part of a total separate transaction from the one updating the model and the rest of the Coordinator Config. This will make the update-config command a little more expensive but we can handle many data providers without reaching the transaction limits