[GHA] Uplift Linux IGC Dev RT version to igc-dev-6ee988a#16487

bb-sycl wants to merge 1 commit intosyclintel/llvm:syclfrom

ci/update_gpu_driver-linux-igc-dev-6ee988aintel/llvm:ci/update_gpu_driver-linux-igc-dev-6ee988aCopy head branch name to clipboard