[MLIR][LinAlg] Use AnyTypeOf for LinalgOperand for better error msg.

Previously, `LinalgOperand` is defined with `Type<Or<..,>>`, which produces
not very readable error messages when it is not matched, e.g.,

```
'linalg.generic' op operand #0 must be anonymous_326, but got ....
```

It is simply because the `description` property is not properly set.

This diff switches to use `AnyTypeOf` for `LinalgOperand`, which automatically
generates a description based on the allowed types provided.

As a result, the error message now becomes:

```
'linalg.generic' op operand #0 must be ranked tensor of any type values or strided memref of any type values, but got ...
```

Which is clearer and more informative.

Reviewed By: nicolasvasilache

Differential Revision: https://reviews.llvm.org/D84428