[SYCL][Driver] Refactor device config parsing to better match HIP and CUDA targets

[GeorgeWeb]

Refactors the device config parsing by making it agnostic of the way the SYCL device is targeted, either by passing a device triple plus arch special string to -fsycl-targets or a just the device arch to --offload-arch (mostly for CUDA and HIP). This is achieved by also moving the parsing logic into SYCLActionBuilder, in order to make use of the device architecture bound to the offloading toolchain to lookup in the DeviceConfig file's TargetTable accordingly. This PR also introduces HIP and CUDA target info in the DeviceConfigFile.td which is currently not complete but a starting point to build on.