[RelayMiner] Integrate new RelayMiner configuration

[red-0ne]

Objective

The current RelayMiner naive configuration file structure and parser is lacking capabilities to handle real life use cases like reverse proxy usage, server containerization and elaborate backend setups.

Origin Document

The new config discussion happened in this page:
https://www.notion.so/buildwithgrove/Actors-configs-dependencies-etc-ab9a93322b8744a2aaa089d5b4758b75?pvs=4#8eaa5c5a3f4743319cc1e8360d058be3

Final config structure proposed:
#246

pocket:
  query_node_rpc_url: tcp://localhost:36657
  query_node_grpc_url: tcp://127.0.0.1:36658
  tx_node_grpc_url: tcp://127.0.0.1:36658
signing_key_name: servicer1
proxies:
  - name: http-example
    host: 127.0.0.1
    port: 8080
    type: http 
suppliers:
  - name: ethereum
    type: http
    service_config:
      url: http://anvil.servicer:8545
      authentication:
        username: user
        password: pwd
      headers: {}
    hosts:
      - ethereum.devnet1.poktroll.com 
      - ethereum # <- this part can be added automatically.
    proxy_names:
      - http-example # when the RelayMiner server builder runs.
  - name: 7b-llm-model
    type: http
    service_config:
      url: http://llama-endpoint
    hosts:
      - 7b-llm-model.devnet1.poktroll.com 
      - 7b-llm-model # <- this part can be added automatically.
    proxy_names:
      - http-example # when the RelayMiner server builder runs.

Goals

• Be able to parse the new config structure
• Adapt the RelayerProxy to handle the new configuration and start the adequate servers

Deliverables

• PR for parsing the config into the adequate structure
• PR for adapting the RelayerProxy to use the new config

Non-goals / Non-deliverables

• Implement additional types other than http
• Implement authentication mechanisms beyond basic auth

General deliverables

• Comments: Add/update TODOs and comments alongside the source code so it is easier to follow.
• Testing: Add new tests (unit and/or E2E) to the test suite.

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Creator: @red-0ne
Co-Owners: @okdas

[red-0ne]

Closed by #284