Calibrate and Quantize Passes for Relax

[ksaurabh-cadence]

Thanks @tqchen for addressing this in a separate thread. Sharing here for @geyijun -

Phasing out Legacy Components

For new flow we don’t have caliberation flow inside framework, as many calberations are now moved to the upper layer. For example, frameworks like MLC-LLM that usually runs quantization first then build up the quantized model through fused dequant mm operators