[GPU] Add coalescing to reduction tiling #47399

Job	Run time
setup / setup	9s
runtime :: windows-2022	1m 45s
runtime_small	1m 47s
runtime :: ubuntu-24.04-arm	1m 41s
runtime_tracing :: macos-14 :: console	1m 6s
runtime_tracing :: ubuntu-24.04 :: tracy	1m 12s
runtime_tracing :: windows-2022 :: tracy	1m 48s
runtime :: macos-14	50s
runtime_tracing :: windows-2022 :: console	1m 46s
runtime :: ubuntu-24.04	1m 34s
runtime_tracing :: macos-14 :: tracy	1m 33s
linux_x64_bazel / linux_x64_bazel	10s
runtime_tracing :: ubuntu-24.04-arm :: tracy	1m 23s
linux_x64_clang_ubsan / linux_x64_clang_ubsan	1m 33s
runtime_tracing :: ubuntu-24.04-arm :: console	1m 14s
runtime_tracing :: ubuntu-24.04 :: console	1m 19s
linux_x64_clang_asan / linux_x64_clang_asan	1s
linux_x64_clang / linux_x64_clang	1s
macos_arm64_clang	0s
windows_x64_msvc	0s
macos_x64_clang	0s
linux_x64_gcc	0s
linux_x64_clang_byollvm	0s
linux_x64_clang_debug	0s
linux_arm64_clang	0s
linux_x64_clang_tsan	0s
ci_summary / summary	3s
	20m 55s

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