python-openstackclient 5.6.0 release

meta:version: 5.6.0
meta:diff-start: -
meta:series: xena
meta:release-type: release
meta:pypi: yes
meta:first: yes
meta:release:Author: Artem Goncharov <Artem.goncharov@gmail.com>
meta:release:Commit: Artem Goncharov <Artem.goncharov@gmail.com>
meta:release:Change-Id: I2e26c49ef0428e77da09c86890d63912f3af722b
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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