Expose create_buffer_gc in a header

**Is your feature request related to a problem? Please describe.**
When using pyvkfft, vkfft calls clCreateBuffer which fails sometimes because it doesn't run the garbage collector.

**Describe the solution you'd like**
If we could have a header like below, we can include that in pyvkfft.

```OpenCL
#include

static inline pyopenclCreateBuffer(cl_context ctx,
cl_mem_flags flags,
size_t size,
void *host_ptr,
cl_int *status_code) {
PYOPENCL_RETRY_IF_MEM_ERROR(
clCreateBuffer(ctx, flags, size, host_ptr, status_code);
if (*status_code != CL_SUCCESS)
throw pyopencl::error("pyopenclCreateBuffer", *status_code);
);
}

#define clCreateBuffer pyopenclCreateBuffer
```

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

**Additional context**
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