[GPU] Disable insert/extract slice lowering from pack/unpack by default #33249

Job	Run time
setup / setup	8s
runtime_tracing :: tracy provider	1m 17s
runtime_tracing :: console provider	1m 17s
runtime :: ubuntu-24.04	1m 20s
runtime_small	1m 49s
runtime :: windows-2022	1m 44s
runtime :: macos-14	1m 38s
linux_x64_bazel / linux_x64_bazel	1m 36s
linux_x64_clang / linux_x64_clang	1m 47s
linux_x64_clang_asan / linux_x64_clang_asan	1m 23s
ci_summary / summary	1s
	14m 0s

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