encoding/binary: add AppendUvarint and AppendVarint #51644
Description
#50601 introduced AppendByteOrder, so it would be nice if we had
func AppendUvarint(buf []byte, x uint64) []byte
func AppendVarint(buf []byte, x int64) []byte{{ message }}
#50601 introduced AppendByteOrder, so it would be nice if we had
func AppendUvarint(buf []byte, x uint64) []byte
func AppendVarint(buf []byte, x int64) []byte