Resolves #855

Check that the version of the circuits saved in the wallet database matches the version saved on S3.
To check the version of the circuits, first download the file circuit-info.json, containing names and hashes of all circuits on S3, then compare the hashes in the file with the hashes of the circuits in the wallet database. If the hashes do not match, the circuits in the database are updated by downloading the new version from S3.
The algorithm used to calculate the hash is SHA256.

The circuit-info.json file is a JSON having the names of the circuits as keys and the hash of the relevant circuit as value. The file must be in the circuit folder of the bucket, currently there is only one circuit-info.json test file with empty hash, in the nightfallv3-testnet bucket.

Example of the circuit-info.json file:

{
    "deposit-abi": "",
    "deposit-program": "",
    "deposit-pk": "",
    "single_transfer-abi": "",
    "single_transfer-program": "",
    "single_transfer-pk": "",
    "double_transfer-abi": "",
    "double_transfer-program": "",
    "double_transfer-pk": "",
    "withdraw-abi": "",
    "withdraw-program": "",
    "withdraw-pk": ""
}