Rename *codec.Codec to *codec.LegacyAmino (#6991)

* Rename *codec.Codec to *codec.LegacyAmino

* Implement requested changes

Co-authored-by: Aaron Craelius <aaron@regen.network>

testutil/network/network.go

@@ -62,7 +62,7 @@ func NewSimApp(val Validator) servertypes.Application {
 // in-process local testing network.
 type Config struct {
 	Codec            codec.Marshaler
-	LegacyAmino      *codec.Codec
+	LegacyAmino      *codec.LegacyAmino
 	TxConfig         client.TxConfig
 	AccountRetriever client.AccountRetriever
 	AppConstructor   AppConstructor             // the ABCI application constructor
@@ -315,7 +315,7 @@ func New(t *testing.T, cfg Config) *Network {
 			WithHomeDir(tmCfg.RootDir).
 			WithChainID(cfg.ChainID).
 			WithJSONMarshaler(cfg.Codec).
-			WithCodec(cfg.LegacyAmino).
+			WithLegacyAmino(cfg.LegacyAmino).
 			WithTxConfig(cfg.TxConfig).
 			WithAccountRetriever(cfg.AccountRetriever)