#1422 follow up, Reuse ChannelRequest and ChannelNotification #4709

Job	Run time
ci (ubuntu-20.04, gcc, g++, 20, Release)	10m 12s
ci (ubuntu-20.04, gcc, g++, 20, Debug)	7m 24s
ci (ubuntu-20.04, clang, clang++, 20, Release)	8m 32s
ci (ubuntu-20.04, clang, clang++, 20, Debug)	9m 28s
ci (ubuntu-22.04, gcc, g++, 20, Release)	7m 15s
ci (ubuntu-22.04, gcc, g++, 20, Debug)	8m 46s
ci (ubuntu-22.04, clang, clang++, 20, Release)	10m 31s
ci (ubuntu-22.04, clang, clang++, 20, Debug)	10m 11s
ci (macos-12, gcc, g++, 20, Release)	8m 30s
ci (macos-12, gcc, g++, 20, Debug)	8m 26s
ci (macos-14, clang, clang++, 20, Release)	6m 23s
ci (macos-14, clang, clang++, 20, Debug)	5m 19s
ci (windows-2022, cl, cl, 20, Release)	7m 11s
ci (windows-2022, cl, cl, 20, Debug)	7m 51s
	1h 55m 59s

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