[backport-1.3] capm3: no need to wait for os-image-server unit before pivot

This MR is a backport of !4524 (merged).

The rationale for backporting it is that without it, on a management cluster on which os-image-server downloads many OS images, the capi-providers-pivot-ready will take a long time to become ready, and will cause the pivot Job to timeout.

We have experienced deployment failures due to this.

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 🛠️ oci 🐧 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

Global config for deployment pipelines

• autorun pipelines
• allow failure on pipelines

Notes:

• Enabling autorun will make deployment pipelines to be run automatically without human interaction
• Disabling allow failure will make deployment pipelines mandatory for pipeline success.
• if both autorun and allow failure are disabled, deployment pipelines will need manual triggering but will be blocking the pipeline

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.