http.MaxBytesError not propagated

[ItalyPaleAle]

Describe the bug

When parsing a stream that ends with http.MaxBytesError (created with http.MaxBytesReader), sonic does not propagate it and "swallows" it instead.

To Reproduce

1. Parse a HTTP body passed through http.MaxBytesReader
2. If the body is too large, there's an error

Expected behavior

The error should be http.MaxBytesError, but it's a generic one instead

[AsterDY]

@ItalyPaleAle Thx for feedback, I have fixed it and submit a PR (gin-gonic/gin#4256) for gin.