Upgrade to Cardano 9.2.1

[jpraynaud]

Why

A new version of the Cardano node has been released: 9.2.1. We need to update this dependency in all our code base and make sure that Mithril nodes are compatible with it.

What

Upgrade the Cardano node (and Cardano cli) to 9.2.1 on Mithril networks infrastructure and devnet.

How

• Check if ledger state needs to be recomputed with new Cardano node 9.2.1
• Update Cardano configurations in infra
• Check that we can start Cardano node 9.2.1 on all networks with the new configuration
• Check if the latest stable version of the Mithril aggregator is compatible with new Cardano node 9.2.1
• Update the Cardano cli to 9.2.1 in the Docker images
• Update the Cardano cli to 9.2.1 in the documentation
• Add new entry in the E2E test in the CI for 9.2.1
• Update the Cardano node and cli to 9.2.1 in the devnet
• Update the networks.json files
• Update the Cardano node version to 9.2.1 in the GitHub environments
  • testing-preview
  • testing-sanchonet
  • pre-release-preview (will be done in Release 2442 distribution #1943)
  • release-preprod (will be done in Release 2442 distribution #1943)
  • release-mainnet (will be done in Release 2442 distribution #1943)