Create V2 Execution API to support Forma migration

[ethanoroshiba]

We are significantly changing the way Geth and Conductor communicate, hence we need to break the outlined changes into v2 to support restart of Conductor via "sessions", as determined by the rollup:

• Break protos into 1-1-1
• Introduce ExecutionSession and associated RPC to replace GetCommitmentState and GetGenesisInfo:

message ExecutionSession {
  string session_id = 1;
  ExecutionSessionParameters execution_config = 2;
  CommitmentState commitment_state = 3;
}

• Replace GenesisInfo with ExecutionSessionParameters:

message ExecutionSessionParameters {
  astria.primitive.v1.RollupId rollup_id = 1;
  uint64 rollup_start_block_number = 2;
  uint64 rollup_end_block_number = 3;
  string sequencer_chain_id = 4;
  uint64 sequencer_start_block_height = 5;
  string celestia_chain_id = 6;
  uint64 celestia_block_variance = 7;
}