feat: Adds support for alertConfiguration.severityOverride attribute#3795

ciprian-tibulca merged 9 commits intomastermongodb/terraform-provider-mongodbatlas:masterfrom

CLOUDP-313016_alert_conf_severityOverridemongodb/terraform-provider-mongodbatlas:CLOUDP-313016_alert_conf_severityOverrideCopy head branch name to clipboard