Default to the RPC from the Safe

[asgeir-s]

Is your feature request related to a problem? Please describe.
Stop forcing the user to use the Infura RPC.

Describe the solution you'd like
Instead, get the provider via @gnosis.pm/safe-apps-provider.

For reference:
https://github.com/gnosis/zodiac-safe-app/blob/64916d5d62fa5eda88b949cf55b7f35c4b9e2919/src/services/index.ts#L74