[BUG]: RLE doesn't support discard iterator

### Is this a duplicate?

- [X] I confirmed there appear to be no [duplicate issues](https://github.com/NVIDIA/cccl/issues) for this bug and that I agree to the [Code of Conduct](CODE_OF_CONDUCT.md)

### Type of Bug

Compile-time Error

### Component

CUB

### Describe the bug

`cub::DeviceRunLengthEncode::Encode` doesn't work with `thrust::make_discard_iterator()`.

### How to Reproduce

```cpp
#include
#include

int main()
{
std::size_t temp_storage_bytes = 0;
std::uint8_t *d_temp_storage = nullptr;
int *d_in{}, *d_counts_out{}, *d_unique_out, *d_num_out;

cub::DeviceRunLengthEncode::Encode(d_temp_storage,
temp_storage_bytes,
d_in,
thrust::make_discard_iterator(), // d_unique_out,
d_counts_out,
d_num_out,
0);
}
```
```bash
cub/cub/thread/thread_operators.cuh(72): error: no instance of function template "cuda::std::__4::equal_to::operator()" matches the argument list
argument types are: (const thrust::THRUST_200200_890_NS::detail::any_assign, const thrust::THRUST_200200_890_NS::detail::any_assign)
object type is: cub::CUB_200200_890_NS::Equality
return !op(::cuda::std::forward(t), ::cuda::std::forward(u));
```

### Expected behavior

Successful compilation.

### Reproduction link

_No response_

### Operating System

_No response_

### nvidia-smi output

_No response_

### NVCC version

_No response_