feat: add CI for integration test suite for contract upgrades

[viraj124]

• closes Implement workflow to run a test suite on a fork for contract upgrades #206
• adds upgrade scripts and integration tests that run on a forked L1 network
• removes unused solidity-contracts workspace dependency in fungible-token and message-predicates packages to resolve cyclic dependency

[viraj124]

• Hey, so instead of performing upgrades in the test, I thought it would be better to have the upgrade scripts which would get triggered only in the forked environment and upgrade the current mainnet contracts, before executing the tests.

I suggest to put these scripts in a separate deploy/ folder and use that folder when forking. That will make the deploy scripts easier to read and follow. The delta of changes will be reduced too.

will look into it

this is done

[PraneshASP]

is this safe to expose this key here?

[viraj124]

yeah it is a hardhat test account key we already expose it here