horizon 21.0.0 release

meta:version: 21.0.0
meta:diff-start: -
meta:series: yoga
meta:release-type: release
meta:pypi: no
meta:first: no
meta:release:Author: manchandavishal <manchandavishal143@gmail.com>
meta:release:Commit: manchandavishal <manchandavishal143@gmail.com>
meta:release:Change-Id: If0e5f0b1314f99c0e6bc6f6a841651345a19e158
meta:release:Code-Review+2: Hervé Beraud <herveberaud.pro@gmail.com>
meta:release:Code-Review+2: Elod Illes <elod.illes@est.tech>
meta:release:Workflow+1: Elod Illes <elod.illes@est.tech>
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