Update to cloud-init-20.4-3.el9

• Wed Apr 07 2021 Miroslav Rezanina mrezanin@redhat.com - 20.4-3.el9

• ci-Removing-python-nose-and-python-tox-as-dependency.patch [bz#1916777 bz#1918892]
• Resolves: bz#1916777 (cloud-init requires python-nose)
• Resolves: bz#1918892 (cloud-init requires tox)