v0.40.0

• vmalertmanager: fix VMAlertmanagerConfig discovery according to the docs.
• vmoperator: add alerting rules for operator itself. See this issue for details.
• vmoperator: add revisionHistoryLimitCount field for victoriametrics workload CRDs. See this issue for details. Thanks @gidesh
• vmuser: add new fields to VMUser: drop_src_path_prefix_parts, tls_insecure_skip_verify, metric_labels and load_balancing_policy. See specifications and vmauth docs for more details. Field metric_labels will work only with VMAuth version >= v1.97.0!
• vmoperator: add CRD support for discord_configs, msteams_configs, sns_configs and webex_configs receiver types in VMAlertmanagerConfig. See this issue
• vmoperator: add MinReadySeconds param for all CRDs. See this issue and this PR.