Upgrade to Solidity 0.8.22

[vgeddes]

The main improvement this brings is to allow contracts to emit events defined in other files/contracts. This simplifies some of our event emission.

Changes:

• Contracts now require solidity 0.8.22
• Updated Foundry version
• Updates ABI bindings in relayer
• Smoketest ABI bindings now require serde

Fixes: SNO-730

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ab6d7a0) 82.51% compared to head (caccc0f) 83.29%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #992      +/-   ##
==========================================
+ Coverage   82.51%   83.29%   +0.77%     
==========================================
  Files          51       51              
  Lines        2065     2065              
  Branches       71       71              
==========================================
+ Hits         1704     1720      +16     
+ Misses        345      330      -15     
+ Partials       16       15       -1     

Flag	Coverage Δ
solidity	81.16% <100.00%> (+4.43%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
contracts/src/Agent.sol	100.00% <ø> (ø)
contracts/src/AgentExecutor.sol	100.00% <ø> (ø)
contracts/src/Assets.sol	78.57% <100.00%> (+10.71%)	⬆️
contracts/src/BeefyClient.sol	87.70% <ø> (ø)
contracts/src/FundAgent.sol	0.00% <ø> (ø)
contracts/src/Gateway.sol	87.16% <ø> (+8.78%)	⬆️
contracts/src/GatewayProxy.sol	100.00% <ø> (ø)
contracts/src/Verification.sol	52.94% <ø> (ø)
contracts/src/storage/AssetsStorage.sol	100.00% <ø> (ø)
contracts/src/storage/CoreStorage.sol	100.00% <ø> (ø)
... and 1 more

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