Session key module

[ly0va]

• refactor storage layout to comply with AA validation restrictions
• make a tx signed by a session key succeed
• fix gas estimation Fix gas estimation for session key transactions #118
• properly restrict creating a session only for a smart wallet that added the module
• fix isInitialized method so that it works correctly even after the module was uninstalled
• add a ton more tests
• revoke all keys if the module is uninstalled
• create getters for sessions and signers
• properly implement a call policy for "no selector"
• add allowance for value in function policy
• [blocked by feat: add block.timestamp asserter for AA zksync-era#3031] add support for checking timestamps during validation Add block.timestamp assertions into Session Key Module #119
• adapt SDK, gateway and demo-app to the new interface

Can be done later:

• plug in all the stuff for ERC7579 standard (right now I only focused on Clave's interface) Implement ERC7579 interface for the session key module #121
• implement support for separate nonce for each session key Implement support for having a separate nonce for each session key #120
• add a post-execution hook to update fee allowance with gas refund

[github-actions]

Visit the preview URL for this PR (updated for commit 1a5d231):

https://zksync-auth-server-staging--pr99-lyova-session-keys-m-0vaa18v6.web.app

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[MexicanAce]

LGTM 🙌