[mlir] Make ShapedTypeComponents contructible from ShapeAdaptor

[mlir] Make ShapedTypeComponents contructible from ShapeAdaptor

ValueShapeRange::getShape() returns ShapeAdaptor rather than ShapedType
and ShapeAdaptor allows implicit conversion to bool. It ends up that
ShapedTypeComponents can be constructed with ShapeAdaptor incorrectly.
The reason is that the type trait
  std::is_constructible<ShapeStorageT, Arg>::value
is fulfilled because ShapeAdaptor can be converted to bool and it can be
used to construct ShapeStorageT. In the end, we won't give any warning
or error message when doing things like
  inferredReturnShapes.emplace_back(valueShapeRange.getShape(0));

Reviewed By: jpienaar

Differential Revision: https://reviews.llvm.org/D120845