Introduce execution provers in participants

[nalepae]

Each participant can now use prover_type and prover_image, that will be connected to the corresponding beacon node.

At the moment, the only usable prover is the "dummy prover", that has to be docker built here.

Example of usage:

participants:
  - el_type: geth
    el_image: ethpandaops/geth:master
    cl_type: prysm
    cl_image: prysm-bn-custom-image:latest
    vc_image: prysm-vc-custom-image:latest


participants:
  - el_type: geth
    el_image: ethpandaops/geth:master
    cl_type: prysm
    cl_image: prysm-bn-custom-image:latest
    vc_image: prysm-vc-custom-image:latest
    prover_type: dummy # <------ Here
    prover_image: dummy-prover:latest # <----- And here


additional_services:
  - dora
  - prometheus_grafana

network_params:
  fulu_fork_epoch: 0
  withdrawal_type: "0x02"
  preset: mainnet
  seconds_per_slot: 4

global_log_level: debug

[barnabasbusa]

this already a thing, just use el_type: dummy

[nalepae]

It's not the same thing. The prover is a new component, used to create a proof.
See the "dummy" implementation of the prover: https://github.com/nalepae/dummy-prover