add fp8 conversion kernel for transpose in row major format

[danielvegamyhre]

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[danielvegamyhre]

Stack from ghstack (oldest at bottom):

• add handling for batch dim in float8nocompile #1512
• add fused transpose and non-transpose kernel and use it for grad output #1497
• integrate new differentiable fp8 conversion funcs into Float8NoCompileLinear #1496
• add torch autograd funcs wrapping new fp8 conversion kernels #1495
• add fp8 conversion kernel that writes both row and column major outputs #1494
• add fp8 conversion kernel for transpose in column major format #1493
• -> add fp8 conversion kernel for transpose in row major format #1492

[pytorch-bot]

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