Convert barriers into copies during allocation (#19735) #33777

Job	Run time
setup / setup	5s
runtime_small	2m 49s
runtime :: ubuntu-24.04	1m 30s
runtime :: windows-2022	3m 43s
runtime :: macos-14	1m 29s
runtime_tracing :: ubuntu-24.04 :: tracy	1m 18s
runtime_tracing :: ubuntu-24.04 :: console	1m 7s
runtime_tracing :: windows-2022 :: tracy	2m 35s
runtime_tracing :: windows-2022 :: console	2m 29s
runtime_tracing :: macos-14 :: tracy	1m 0s
runtime_tracing :: macos-14 :: console	1m 7s
linux_x64_bazel / linux_x64_bazel	18m 44s
linux_x64_clang / linux_x64_clang	6m 44s
linux_x64_clang_asan / linux_x64_clang_asan	11m 31s
ci_summary / summary	2s
	56m 13s

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