Add new banks and delete deprecated ones. fixes #753

Note that banks.json was generated with https://framagit.org/ZeHiro/kresus-bank-list, which causes all these changes.

• Needs !722 (merged) first.
• Update banks.json according to new version of script.
• Add a deprecated property to the bank object.
• add test for 'no_..._found' key in translations.