rmonitor: do no try to install when crosscompiling (#4023) #394

Job	Run time
build-conda-linux	6m 19s
build-conda-macos-x86_64 (macos-14)	4m 42s
build-conda-macos-arm64 (macos-14)	4m 54s
build-conda-macos-x86_64 (macos-13)	7m 59s
build-native-linux (almalinux8)	5m 48s
lint	38s
build-native-linux (almalinux9)	6m 57s
build-native-linux (ubuntu20.04)	5m 32s
build-native-linux (ubuntu22.04)	5m 14s
build-native-linux (ubuntu24.04)	6m 44s
	54m 47s

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