Begin development on v3.27.0

Build v3.25.1 (projectcalico#7444)

* Update release notes generation to Python 3

* Add check_release_status script

* Update manifests for release v3.25.1

* Fix up manifests make rule

* Increase timeout from 3 hours to 6 for testing

* Fix path for install-calico-windows.ps1 and OCP manifests packaging

* Remove output capturing from building container images and send output to stdout/stderr

* Update release notes

Updates for v3.25.0

Begin development on v3.26.0

Updates for v3.24.5

Updates for v3.23.5

Updates for v3.24.4

Updates for v3.24.3

Updates for v3.23.4

Updates for v3.24.2