LinAlg Validation: MatrixOuterProduct

[V-FEXrt]

Per the spec:

The matrix scope must be Thread.

Validation will ensure that:

• The M dimension of the matrix matches the length of vector A
• The N dimension of the matrix matches the length of vector B
• The element type of vector A and vector B must be the same.
• The matrix output type must be Thread scope.
• The matrix dims must be MxN
• the matrix use must be Accumulator

[V-FEXrt]

updated per microsoft/hlsl-specs#921