Switch hardcoded core contracts to come from package

[chasefleming]

Core contracts are currently hardcoded for the project package here:

flow-cli/internal/project/deploy.go

Line 121 in 29918a7

func checkForStandardContractUsageOnMainnet(state *flowkit.State, logger output.Logger, replace bool) error {

We should swap this out to use the package now that provides core contracts by network.

[bthaile]

Flixkit-go would benefit from having mainnet and testnet core-contract addresses it can easily import.