Use grid stride in CSV reader kernels

[vuule]

Currently, the CSV reader parses data using a thread per row, and a separate thread is used for each row, regardless of the file size.
Using a grid stride loop would allow kernels to launch with preset number of blocks even with large input.

This applies both to the parser and the data inference kernels.

[ANIKET0956]

Hi @vuule, if this issue is still open, can i give it a try and post updates?