CI: consolidate sylva-upgrade(-x.x.x) scenarios and default to -from-1.3.x

The primary goal of this MR is to make it easier to run pipelines testing upgrades from 1.3.x.

This MR does the following:

• use the recent 1.3.2 tag where 1.3.1 was used
• rename the sylva-upgrade-from-1.3.1 scenario into sylva-upgrade-from-1.3.x (to not have to change it on each new 1.3.x tag)
• have the sylva-upgrade scenario be an alias for sylva-upgrade-from-1.3.x (it was previously testing upgrades from 1.2.1)
• cleaned up the Nightly pipeline configuration accordingly

Once this is done we can align the CI nightly pipelines defs accordingly: for [release-1.3] - Nightly - Upgrade from 1.2.1 to release-1.3 and Nightly - Upgrade from 1.2.1 to main pipelines, update the DEPLOYMENT_DESCRIPTION to point to the new names revisited by this MR in .gitlab/ci/configuration/predefined-pipelines-config.yaml.

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💡 I'm working separately in !3656 (closed), but this will require a bit more work, so this MR is proposed as a simple solution in the meantime.

CI configuration

Below you can choose test deployment variants to run in this MR's CI.

Click to open to CI configuration

Legend:

Icon	Meaning	Available values
☁️	Infra Provider	capd, capo, capm3
🚀	Bootstrap Provider	kubeadm (alias kadm), rke2
🐧	Node OS	ubuntu, suse
🛠️	Deployment Options	light-deploy, oci, ha, misc
🎬	Pipeline Scenarios	rolling-update, mgmt-rolling-update, k8s-upgrade, sylva-upgrade-from-x.x.x, simple-update, preview, nightly

• 🎬 preview ☁️ capd 🚀 kadm 🐧 ubuntu 🛠️ oci

• 🎬 preview ☁️ capo 🚀 rke2 🐧 suse

• 🎬 preview ☁️ capm3 🚀 rke2 🐧 ubuntu

• ☁️ capd 🚀 kadm 🛠️ light-deploy 🐧 ubuntu

• ☁️ capd 🚀 rke2 🛠️ oci,light-deploy 🐧 suse

• ☁️ capo 🚀 rke2 🛠️ oci 🐧 suse

• ☁️ capo 🚀 kadm 🛠️ oci 🐧 ubuntu

• ☁️ capo 🚀 rke2 🎬 rolling-update 🛠️ ha 🐧 ubuntu

• ☁️ capo 🚀 kadm 🎬 k8s-upgrade 🐧 ubuntu

• ☁️ capo 🚀 rke2 🎬 mgmt-rolling-update 🛠️ ha,misc 🐧 suse

• ☁️ capo 🚀 rke2 🎬 sylva-upgrade-from-1.3.x 🛠️ ha,misc 🐧 ubuntu

• ☁️ capm3 🚀 rke2 🐧 suse

• ☁️ capm3 🚀 kadm 🛠️ oci 🐧 ubuntu

• ☁️ capm3 🚀 kadm 🎬 mgmt-rolling-update 🛠️ ha,misc 🐧 ubuntu

• ☁️ capm3 🚀 rke2 🎬 k8s-upgrade 🛠️ ha 🐧 suse

• ☁️ capm3 🚀 kadm 🎬 rolling-update 🛠️ ha 🐧 ubuntu

• ☁️ capm3 🚀 rke2 🎬 sylva-upgrade-from-1.3.x 🛠️ misc,ha 🐧 suse

• ☁️ capm3 🚀 kadm 🎬 rolling-update 🛠️ ha 🐧 suse

Be aware: after configuration change, pipeline is not triggered automatically. Please run it manually (by clicking the run pipeline button in Pipelines tab) or push new code.