Batch RPC requests through Multicall3

[schmanu]

Problem

A lot of features require multiple RPC requests to the same contract:

• Fetching ERC20 symbol and decimals
• Fetching spending limits
• Recovery

Proposed solution

We could reduce our RPC requests by batching multiple requests into one using the Multicall3 contract.
Therefore we should create a helper function to batch RPC call, which tries to use Multicall3 and fetched individually as a fallback.

Dependencies & risks

• We need to make sure that the Multicall3 contract is deployed on every network (it should be as it is deployed on 250+ chains)