Integration Testing Receipt Indexing (Part 1)

[Zyouell]

This PR is the initial stage for testing Receipt indexing in the Integration test. Upon merge it resolves CRY-22 and CRY-23. It adds the following:

1. A smart contract that emits events, different to the smart contract we use currently for testing storage extraction.
2. Updates TableSource to be a trait rather than an enum, allowing us to be slightly more generic with the table source (i.e. not requiring a slot).
3. Updates TableIndexing to be generic over T: TableSource and also makes the ContractExtractionArgs parameter it holds an Option<ContractExtractionArgs>.
4. Implements functionality to build a TableIndexing<ReceiptExtractionArgs> struct as well as deploy the relevant contract.

[linear]

CRY-22 Create Solidity Contract with Events for Integrated Test

CRY-23 Update `TableIndexing` struct Definition