fix(charts): update helm release victoria-metrics-k8s-stack to v0.25.6

[renovate]

This PR contains the following updates:

Package	Update	Change
victoria-metrics-k8s-stack	patch	0.25.5 -> 0.25.6

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Release Notes

VictoriaMetrics/helm-charts (victoria-metrics-k8s-stack)

v0.25.6

Compare Source

Release notes for version 0.25.6

Release date: 2024-08-29

Update note: Update kubeProxy.spec to kubeProxy.vmScrape.spec

Update note: Update kubeScheduler.spec to kubeScheduler.vmScrape.spec

Update note: Update kubeEtcd.spec to kubeEtcd.vmScrape.spec

Update note: Update coreDns.spec to coreDns.vmScrape.spec

Update note: Update kubeDns.spec to kubeDns.vmScrape.spec

Update note: Update kubeProxy.spec to kubeProxy.vmScrape.spec

Update note: Update kubeControllerManager.spec to kubeControllerManager.vmScrape.spec

Update note: Update kubeApiServer.spec to kubeApiServer.vmScrape.spec

Update note: Update kubelet.spec to kubelet.vmScrape.spec

Update note: Update kube-state-metrics.spec to kube-state-metrics.vmScrape.spec

Update note: Update prometheus-node-exporter.spec to prometheus-node-exporter.vmScrape.spec

Update note: Update grafana.spec to grafana.vmScrape.spec

• bump version of VM components to v1.103.0
• Added dashboards.<dashboardName> bool flag to enable dashboard even if component it is for is not installed.
• Allow extra vmalert.notifiers without dropping default notifier if alertmanager.enabled: true
• Do not drop default notifier, when vmalert.additionalNotifierConfigs is set
• Replaced static url proto with a template, which selects proto depending on a present tls configuration
• Moved kubernetes components monitoring config from spec config to vmScrape.spec
• Merged servicemonitor templates

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