[Relax] Easier use of Function.bind_params with relax.op.create.*

[Lunderberg]

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The Function.bind_params method requires all bound values to have StructInfo annotations. While these are generated on construction for relax::Constant and relax::PrimValue, the most common cases of bound values, other useful expression such as relax.op.zeros(shape,dtype) do not have StructInfo until they are normalized. In addition, because Function.bind_params may be used in contexts that do not have a relax.BlockBuilder available, performing this normalization is not straightforward.

This commit updates the constructors for Relax operations within the tvm.relax.op.create namespace to infer their StructInfo on construction, if it is possible to do so. This allows these operations to be used inside Function.bind_params.