Migrate to Amoy testnet (#742)

* amoy migration -- rename step only

* add amoy USDC contract and chain id

* update contracts.json

* remove some deploy dependencies

* first successful deployment -- no verification

* remove oklink stuff

* real artifacts

* skip bpnori deployments for live networks

* need dummy values for missing contracts config

* new artifacts that correctly reflect defender

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Co-authored-by: amiecorso <[email protected]>

.env.defaults

@@ -3,16 +3,15 @@
 
 # Alchemy
 ETHEREUM_RPC_URL=NULL
-GOERLI_RPC_URL=NULL
-MUMBAI_RPC_URL=NULL
+AMOY_RPC_URL=NULL
 POLYGON_RPC_URL=NULL
 
 # Ethernal
 ETHERNAL_EMAIL=NULL
 ETHERNAL_PASSWORD=NULL
 ETHERNAL=false
 
-# Etherscan
+# Block Explorer APIs
 ETHERSCAN_API_KEY=NULL
 POLYGONSCAN_API_KEY=NULL