feat(alertmanager): add PVC for silences persistance to the v.12.0.1-…#140

neilamumi wants to merge 2 commits intov12.0.1-manual-branchcamptocamp/devops-stack-module-kube-prometheus-stack:v12.0.1-manual-branchfrom

v12.0.1-manual-branch-alertmanager-persistancecamptocamp/devops-stack-module-kube-prometheus-stack:v12.0.1-manual-branch-alertmanager-persistanceCopy head branch name to clipboard