CL_PLATFORM_NOT_FOUND_KHR (-1001) while using docker ubuntu22.04 image with GPU enabled.

Hi, I'm new to heterogeneous programming with OpenCL. Today, I'm trying to create workspace using docker image ubuntu22.04 for OpenCL development.

Firstly, I run docker image with GPU enable via `--gpus all` flag:
`docker run --gpus all -it my_container ubuntu:22.04`

then I downloaded all the header file (`/usr/include/CL/`) and ICD (Installable Client Driver) which located in /`usr/lib/x86_64-linux-gnu/libOpenCL.so`

my toy program `main.c` in OpenCL:

```
#define CL_TARGET_OPENCL_VERSION 300

#include
#include

int main() {
cl_device_id my_device_id;
int result;
clGetDeviceIDs(
NULL,
CL_DEVICE_TYPE_GPU,
1,
&my_device_id,
NULL
);
if (result != CL_SUCCESS) {
printf("Something went wrong\n");
return 1;
} else {
printf("Good");
}

}
```

I compiled with `gcc main.c -o ./main -lOpenCL`, output: `clGetPlatformIDs(-1001)`

What am I missing in here? How can I develop workflow for OpenCL in docker, I see cuda/opencl image but it seems not maintain anymore.

Edit: After an hour of [searching ](https://github.com/microsoft/WSL/issues/6951)I found that I missed the package called `pocl-opencl-icd`. Just simply `sudo apt install pocl-opencl-icd`, now `clinfo` show it found 1 platform but not CUDA platform in docker env.

Question: What is the relationship between Pocl and OpenCL. Why include pocl in docker container make clinfo can detect platform but in the "normal" environment, I mean the host OS not docker container, I don't need to download pocl-opencl-icd so `clinfo` still be able to detect platform? What is the different in here? Please enlighten me.

No repository file or test is named. Start by reviewing the issue body, the pocl-opencl-icd and clinfo references, and the linked WSL discussion to assess whether the guide should explain Docker OpenCL ICD setup and the host/container distinction; the payload does not define a specific documentation change or completion test.

Written by the indexing model from the issue text.