horizon 13.0.0.0rc2 release candidate

meta:version: 13.0.0.0rc2
meta:diff-start: -
meta:series: queens
meta:release-type: release candidate
meta:pypi: no
meta:first: no
meta:release:Author: Ying Zuo <yingzuo4@gmail.com>
meta:release:Commit: Ying Zuo <yingzuo4@gmail.com>
meta:release:Change-Id: I52fed58c7997eaf49ed0dd3089c27a6f3d88e5f8
meta:release:Code-Review+2: Tony Breeds <tony@bakeyournoodle.com>
meta:release:Workflow+1: Tony Breeds <tony@bakeyournoodle.com>
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