refactor(client): add client/Context.Codec and deprecate JSONCodec (#9498)

* chore(types): add sdk.Context.Codec and deprecate JSONCodec

* Use clientContext.Codec rather than JSONCodec everywhere

* update tests to use clientContext.Codec

* added a note that EncodingConfig.Marshaler will be renamed to Codec

* update changelog

* fix tests to use clientCtx.WithCodec instead of WithJSONCodec

* fix genutil build

* Update simapp/params/encoding.go

Co-authored-by: Amaury <1293565+amaurym@users.noreply.github.com>

Co-authored-by: Amaury <1293565+amaurym@users.noreply.github.com>

testutil/network/network.go

@@ -346,7 +346,7 @@ func New(t *testing.T, cfg Config) *Network {
 			WithHomeDir(tmCfg.RootDir).
 			WithChainID(cfg.ChainID).
 			WithInterfaceRegistry(cfg.InterfaceRegistry).
-			WithJSONCodec(cfg.Codec).
+			WithCodec(cfg.Codec).
 			WithLegacyAmino(cfg.LegacyAmino).
 			WithTxConfig(cfg.TxConfig).
 			WithAccountRetriever(cfg.AccountRetriever)