Beacon in a determinstic slot in the beacon interval #1203

Job	Run time
hygiene	49s
build (arm-unknown-linux-gnueabihf)	2m 48s
build (armv5te-unknown-linux-musleabi)	2m 53s
build (armv7-unknown-linux-musleabihf)	3m 7s
build (aarch64-unknown-linux-musl)	3m 48s
build (mips-unknown-linux-musl)	2m 47s
build (mipsel-unknown-linux-musl)	3m 12s
build (x86_64-unknown-debian-gnu)	2m 46s
build (x86_64-tpm-debian-gnu)	3m 9s
docker_buildx	8m 45s
release	0s
	34m 4s

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