config: Testnet 4844 fork time

[welkin22]

Description

Update configuration to set the 4 fork times for Testnet. These forks are: Snow Time: May-15-2024 06:00 AM +UTC Shanghai/Canyon Time: May-15-2024 06:10 AM +UTC Delta Time: May-15-2024 06:20 AM +UTC Cancun/Ecotone Time: May-15-2024 06:30 AM +UTC

The version of op-geth referenced in go.mod has also been replaced.

Rationale

N/A

Example

N/A

Changes

Notable changes:

• configuration update
• the version of op-geth has been replaced