🎁 External deployments in hardhat config

[janjakubnanista]

In this PR

• Adding withLayerZeroDeployments utility that enriches hardhat config with external deployments from NPM packages. It works with any packages that export deployments folder but for marketing purposes we still call it withLayerZeroDeployments. This will make the external deployments available in deploy scripts and tasks.
• Removing unneeded functionality
• Adding endpointId to hardhat network config

// hardhat.config.ts
import { EndpointId } from "@layerzerolabs/lz-definitions"

const config: HardhatUserConfig = {
   networks: {
     arbitrum: {
       endpointId: EndpointId.ARBITRUM_MAINNET
     },
     fuji: {
       endpointId: EndpointId.AVALANCHE_TESTNET
     }
   }
}

export default withLayerZeroDeployments("@layerzerolabs/lz-evm-sdk-v1")

When invalid endpoint ID is specified in hardhat config, error like this is displayed in the console:

[sirarthurmoney]

😍