[SYCL] Initialize uninitialized handler_impl fields (#15323) #2369

Job	Run time
build-win / Build + LIT	47m 54s
macOS / Build	16m 45s
Linux (Self build + no-assertions) / Build + LIT	15m 11s
e2e-lin (Intel GEN12 Graphics with Level Zero, ["Linux", "gen12"], --param gpu-intel-gen12=True, ... / Intel GEN12 Graphics with Level Zero	30m 53s
e2e-lin (Perf tests on Intel Arc A-Series Graphics system, ["Linux", "arc"], {"LIT_FILTER":"Perfo... / Perf tests on Intel Arc A-Series Graphics system	1m 25s
e2e-lin (Intel Arc A-Series Graphics with Level Zero, ["Linux", "arc"], --param matrix-xmx8=True ... / Intel Arc A-Series Graphics with Level Zero	12m 26s
e2e-lin (AMD/HIP, ["Linux", "amdgpu"], ghcr.io/intel/llvm/ubuntu2204_build:latest-0300ac924620a51... / AMD/HIP	36m 48s
e2e-lin (Perf tests on Intel GEN12 Graphics system, ["Linux", "gen12"], {"LIT_FILTER":"Performanc... / Perf tests on Intel GEN12 Graphics system	1m 56s
e2e-win / Intel GEN12 Graphics with Level Zero	40m 40s
	3h 23m 58s

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