feat: adds BLS signature verification for provider registration

[ckartik]

This PR introduces updates to the smart contracts, testing infrastructure, and other components impacting provider flow, registration, and staking processes:

1. Provider Registration:

   • Providers must now sign their EOA account address during registration and include the signature in the StakeRequest.
     • The authentication of the EOA as the owner of the private key associated with the registered BLS public key.
     • Cryptographic linkage of the registered BLS key (used in relays) to the EOA, identifying the provider/builder on MEV-commit.

2. Protobuf Updates:

   • Updates were made to the protobufs to accommodate changes in the StakeRequest structure.

3. P2P Nodes:

   • Minor updates were made to aspects of P2P nodes to align with these changes.

These updates collectively strengthen the staking and registration process while improving integration with the relay and P2P components.

Issue ticket number and link

Fixes # (issue)

Checklist before requesting a review

• I have added tests that prove my fix is effective or that my feature works.
• I have made corresponding changes to the documentation.

[chrmatt]

Verifying the BLS key is a good step! I suggest to not just sign the address though, as discussed in more detail below.

Will improve signed payload in subsequent versions.