Support indexing for V2 executions

[mpetrun5]

Add support for indexing executions of V2 contracts (sygma-x-solidity repo).

Implementation details

The contracts addresses should be fetched from the V2 shared configuration and should be stored
in the same table as the existing executions.
The Execution table should be extended to support new params.

Testing details

• unit tests
• e2e tests

Acceptance Criteria

• V2 executions are indexed