Run fork tests against Ethereum Mainnet

[PaulRBerg]

Once V2 Core is published and deployed to Ethereum Mainnet, we should refactor the fork tests in this repo to use Ethereum Mainnet instead of Goerli.

Related:

• https://github.com/sablier-labs/v2-core/issues/577
• https://github.com/sablier-labs/v2-periphery/issues/110

[PaulRBerg]

Addresses

Sablier

The addresses for all Sablier V2 deployments can be found here:

https://docs.sablier.com/contracts/v2/addresses

PRBProxy

PRBProxyRegistry is deployed at the same address on all chains: 0xD42a2bB59775694c9Df4c7822BfFAb150e6c699D.

See prbproxy.com.