[UR][OpenCL] Move banned platforms filtering to UR

[PatKamin]

Filter out banned OpenCl platforms earlier, in the UR OpenCL adapter instead of the SYCL RT.

[RossBrunton]

Is there a reason this needs to be baked into the binary? Would having it be specified in a config file not mean it could be modified by vendors/sysadmins without having to rebuild DPCPP?

[uditagarwal97]

We should also ban opencl:fpga. If device name is not known for fpga, can we filter on the basis of device type? Perhaps by using clGetDeviceInfo (https://registry.khronos.org/OpenCL/specs/3.0-unified/html/OpenCL_API.html#platform-querying-devices)

[uditagarwal97]

We need to ban opencl:fpga as well

[PatKamin]

Is there a reason this needs to be baked into the binary? Would having it be specified in a config file not mean it could be modified by vendors/sysadmins without having to rebuild DPCPP?

This is to avoid possible future issues like this one by simplifying SYCL RT logic. This could possibly be made with a config file set with SYCL_CONFIG_FILE_NAME but this could lead to hard to track bugs if this env var is not set or is set with an incomplete list of banned platforms. I think the current approach would be more reliable.

[uditagarwal97]

SYCL RT LGTM.

[PatKamin]

@intel/llvm-gatekeepers, please consider merging. Jenkins failure seems to be unrelated as it fails on other PRs, too.