fix(tars2go): Resolve TByte support and trace variable shadowing bugs

[weigod]

1, tars/tools/tars2go/gencode/gen_go.go typeDef function need surport TByte
2, In tars/tools/tars2go/gen_go.go, the genTarsTrace function generates code for RPC tracing. Inside this generated code, a new local variable value is declared as map[string]interface{} (value := map[string]interface{}{} ).
This creates a variable shadowing problem if the Tars interface function has an out parameter that is also named value (e.g., out string value).

[baiweiguo]

您好！您的邮件已收到，我将会尽快地进行处理，谢谢来信！

[weigod]

The attached file can fix this problem, I do not have permission to create PR directly.
/tars/tools/tars2go/gencode/gen_go.go

gen_go.go.txt