[mlir] don't hardcode PDL_Operation in Transform dialect extensions

Update operations in Transform dialect extensions defined in the Affine,
GPU, MemRef and Tensor dialects to use the more generic
`TransformHandleTypeInterface` type constraint instead of hardcoding
`PDL_Operation`. See
https://discourse.llvm.org/t/rfc-type-system-for-the-transform-dialect/65702
for motivation.

Remove the dependency on PDLDialect from these extensions.

Update tests to use `!transform.any_op` instead of `!pdl.operation`.

Reviewed By: nicolasvasilache

Differential Revision: https://reviews.llvm.org/D150781