BinaryCodec uses varbinary which limits the byteArray to 65kb

[SzalkaiGabor]

Hi,

I'd like to use byte[] to store files (around 2MB), however I got an exception like
Value 1087591 exceeds uShort.MAX_VALUE. The value of uShort.MAX_VALUE is 65535, and this limitation comes from
io.r2dbc.mssql.codec.BinaryCodec#encode -> io.r2dbc.mssql.codec.RpcEncoding#prepareBuffer.
The exception is thrown in io.r2dbc.mssql.message.tds.Encode#uShort.

Based on the discussion in https://gitter.im/R2DBC/r2dbc with @mp911de

We could conditionally use VARBINARY(MAX) or IMAGE (PLP-encoded stream) if the array size is greater than 65535
(Basically what BlobCodec does)