[mlir][spirv] Deserialize OpConstantComposite of type Cooperative Matrix #142786
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This is to enable `CooperativeMatrixType` to be used with `DenseElementsAttr`, so that a `spirv.Constant` can be easily built from `OpConstantComposite`. For example: ```mlir %cst = spirv.Constant dense<0.000000e+00> : !spirv.coopmatrix<1x1xf32, Subgroup, MatrixAcc> ``` Additional constraints are added to arithmetic operations, as `SameOperandsAndResultType` can no longer fully verify CoopMatrices. This is because for shaped types the verifier only checks element type and shapes, whereas for any other arbitrary type it looks for an exact match. This patch does not enable the actual deserialization.
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Depends on #142784.