[Custom OP] support double attribute type

[BeingGod]

PR Category

Operator Mechanism

PR Types

New features

Description

The attribute of Custom operator support double type.

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[BeingGod]

@HydrogenSulfate The request is from Open3D for paddle (Details: https://github.com/PaddlePaddle/community/pull/975). We need to align the parameters of operators to torch.