[UR] Add SYCL_UR_L0_LOADER_SKIPLIST and SYCL_UR_L0_DRIVER_SKIPLIST (#21539)
Add `SYCL_UR_L0_LOADER_SKIPLIST` and `SYCL_UR_L0_DRIVER_SKIPLIST`
environment variables that can contain comma-separated lists
of versions of L0 loader and L0 driver respectively
for which loading of L0 adapter should be skipped,
for example: "1.6.33578,1.14.37020".
Level Zero Loader version older than 1.8.0 is not supported from now on
if `SYCL_UR_L0_LOADER_SKIPLIST` is not set.
---------
Signed-off-by: Lukasz Dorau <lukasz.dorau@intel.com>