Bump StableHLO to openxla/stablehlo@23d7f60. #33855

Job	Run time
setup / setup	7s
runtime :: ubuntu-24.04	5m 22s
runtime :: ubuntu-24.04-arm	1m 37s
runtime_small	2m 24s
runtime :: windows-2022	3m 43s
runtime :: macos-14	1m 19s
runtime_tracing :: ubuntu-24.04 :: tracy	1m 17s
runtime_tracing :: ubuntu-24.04 :: console	1m 8s
runtime_tracing :: ubuntu-24.04-arm :: tracy	1m 7s
runtime_tracing :: ubuntu-24.04-arm :: console	1m 8s
runtime_tracing :: windows-2022 :: tracy	2m 22s
runtime_tracing :: windows-2022 :: console	2m 29s
runtime_tracing :: macos-14 :: tracy	56s
runtime_tracing :: macos-14 :: console	58s
linux_x64_bazel / linux_x64_bazel	28m 36s
linux_x64_clang / linux_x64_clang	8m 31s
linux_x64_clang_asan / linux_x64_clang_asan	18m 33s
ci_summary / summary	2s
	1h 21m 39s

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