[SRE] Enable VM 2.0 in DevNet for development & testing

[devendran-m]

Joe suggests:

• DevNet is alive with old Mainnet data (~3M blocks).
• Can enable VM 2.0 via config flag.
• Proposal to transform DevNet into a nightly test network.
• Automated test suite would validate upgrades across Node, Sidecar, and Client.
• DevNet should not be considered production-stable; resets possible after failures.
• Joe is working on scripting architecture to automate refreshes and test execution.

Michał prefers launching DevNet with a fresh state post Mainnet release of 2.0.