fix(configs): Custom branch for v25 genesis

[sanekmelnikov]

What ❔

• updates the values in genesis.yaml, sepolia.yaml to match what's actually on a chain
• makes zkstack_cli to compile system contracts with hardhat instead of forge

Why ❔

v25 upgrade was performed with system contracts compiled with hardhat
Since genesis code in main uses forge - that causes system contracts to be deployed with different bytecodes, thus resulting into different genesis hashes and failure on genesis step due to hash mismatch.
That makes genesis of new v25 chains on ZKsync ecosystems (sepolia, mainnet) impossible from main and this branch is created solely to perform genesis step for these.

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• Code has been formatted via zkstack dev fmt and zkstack dev lint.