Add mkosi flashbots-images VM to playground

[fkondej]

No description provided.

[ferranbt]

Why is this necessary? I remember at some point if target peers was not 0, the beacon node would wait for the number of peers before returning as healthy, which would create problems for non builder-hub deploymnets.

[fkondej]

To clarify the setup:

• Playground runs reth + lighthouse in Docker
• VM adds a second reth + lighthouse pair that needs to sync with playground
• need to support both: playground with VM and without VM

Current behavior:

• --target-peer 0: VM's lightouse doesn't connect to the playground
• --target-peer 1: Vm works, but you mentioned this breaks non-VM setup

I've tried --subscribe-all-subnets with --target-peers 0 but VM still doesn't connect.

Do you know a config that would work for both VM and non-VM setups?