Add INT8 support to fbgemm qcomm lib #1337
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Summary:
Add INT8 codec to fbgemm library. Also defined a context class to pass the row_dim and row_dim_quant parameters during coding and encoding.
For INT8, the output size is decided by row dim, which is needed by high level collective communication modules. To that purpose, this diff adds a new calc_quantized_size function and implement it based on the INT8 codec logic.
Differential Revision: D39473386