[DispatchCreation] Make truncate operations fuse with producers. #34397

Job	Run time
setup / setup	7s
runtime_small	2m 20s
runtime :: ubuntu-24.04	5m 35s
runtime :: ubuntu-24.04-arm	1m 38s
runtime :: windows-2022	2m 57s
runtime :: macos-14	1m 36s
runtime_tracing :: ubuntu-24.04 :: tracy	1m 15s
runtime_tracing :: ubuntu-24.04 :: console	1m 10s
runtime_tracing :: ubuntu-24.04-arm :: tracy	1m 13s
runtime_tracing :: ubuntu-24.04-arm :: console	1m 26s
runtime_tracing :: windows-2022 :: tracy	2m 38s
runtime_tracing :: windows-2022 :: console	2m 1s
runtime_tracing :: macos-14 :: tracy	1m 6s
runtime_tracing :: macos-14 :: console	1m 1s
linux_x64_bazel / linux_x64_bazel	30m 39s
linux_x64_clang / linux_x64_clang	26m 28s
linux_x64_clang_asan / linux_x64_clang_asan	30m 28s
ci_summary / summary	2s
	1h 53m 40s

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