[Inductor][float8] Support qlinear for float8 in inductor

[shiyang-weng]

For float8_e4m3fn, support

register_qlinear_weight_prepack
_register_qlinear_unary_fusion
_register_qlinear_binary_fusion
quant_lift_up

on inductor.

For FP8, there are following issues

1. q/dq switch to use quantize_affine_float8/dequantize_affine_float8
2. The q/dq API change. The fp8 q/dq requires type(scale) is tensor.
3. pt2e not support float8.

Based on these issues,

1. Need to handle fp8 q/dq pattern separately.
2. Handle scale separately.
3. We implement the function(fp8_convert_), which can add q/dq before the linear in the model. We add the function to test/quantization/pt2e/test_x86inductor_fusion.py

[pytorch-bot]

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[Xia-Weiwen]

Thanks for the PR!

[Xia-Weiwen]

LGTM

[pytorch-bot]

Didn't find following labels among repository labels: topic:,not,user,facing

[shiyang-weng]

@pytorchbot label "topic: not user facing"

[shiyang-weng]

@jerryzh168 Could you help review this pr