refactor(simapp): add ,squash flag (#17172)

simapp/simd/cmd/root.go

@@ -146,7 +146,7 @@ func initAppConfig() (string, interface{}) {
 	}
 
 	type CustomAppConfig struct {
-		serverconfig.Config
+		serverconfig.Config `mapstructure:",squash"`
 
 		WASM WASMConfig `mapstructure:"wasm"`
 	}

simapp/simd/cmd/root_v2.go

@@ -156,7 +156,7 @@ func initAppConfig() (string, interface{}) {
 	}
 
 	type CustomAppConfig struct {
-		serverconfig.Config
+		serverconfig.Config `mapstructure:",squash"`
 
 		WASM WASMConfig `mapstructure:"wasm"`
 	}