general: add support for applying to rounds deployed on networks (multi-chain future)

[michellema1208]

User Story As a project owner, I want to be able to apply to a round that is deployed on a different network than the one I created my project on, so that I don't have to create duplicate copies of my project just to apply to a new round

Acceptance Criteria GIVEN that I am on the application page of a round that is deployed on a different network than the one I created my project on WHEN I select a project to apply with THEN I am able to select an existing project I created on a different network

Notes/Assumptions:

• Before reintroducing subgraph, use a fixed web3 provider pointing to Optimism to fetch projects - we would not use the same provider the wallet is connected to
• End state: We want to have the ability to fetch projects from the subgraph and from the contracts (if subgraph fetch fails, we would read directly from contracts)
• Recall, there is no interaction between Grant Hub project registry and round manager contract