Update alertmanager from 0.28.1 to 0.30.0

[prometheus-rpm-bot]

https://github.com/prometheus/alertmanager/releases/tag/v0.30.0
Release notes:

* [CHANGE] Don't allow calling qids with an empty ids list. #4707
* [FEATURE] Add mattermost integration. #4090
* [FEATURE] Add saturday to the first day of the week options. #4473
* [FEATURE] Add templating functions for working with urls. #4625
* [FEATURE] cluster: Allow persistent peer names. #4636
* [FEATURE] dispatch: Add start delay. #4704
* [FEATURE] provider: Add subscriber channel metrics. #4630
* [FEATURE] template: Add tojson function. #4773
* [FEATURE] Add api http metrics. #4162
* [FEATURE] Add distributed tracing support. #4745
* [FEATURE] Add names to inhibit rules. #4628
* [FEATURE] Add timeout option for pagerduty notifier. #4354
* [FEATURE] Add timeout option for slack notifier. #4355
* [FEATURE] Allow nested details fields in pagerduty. #3944
* [FEATURE] Implement `phantom_threading` to group email alerts into threads. #4623
* [FEATURE] gc: Report errors, but remove erroneous silences and continue. #4724
* [FEATURE] jira: Template customfields. #4029
* [FEATURE] jira: Allow configuring issue update via parameter. #4621
* [FEATURE] Slack app support. #4211
* [ENHANCEMENT] Add comment about smtp plain authentication. #4741
* [ENHANCEMENT] Add documentation about high availability. #4708
* [ENHANCEMENT] Add documentation for `client_allowed_sans`. #4706
* [ENHANCEMENT] Improve logging around webhook dispatch failure. #4511
* [ENHANCEMENT] Compile silence matchers when the silence is added. #4695
* [ENHANCEMENT] Fix '`s/client/alerts_api/g`' broken link in 0.29. #4718
* [ENHANCEMENT] Fix `rocketchat_config` docs. #4767
* [ENHANCEMENT] Fix: `<mute_time_interval>` was renamed. #4729
* [ENHANCEMENT] Improve inhibition performance. #4607
* [ENHANCEMENT] Loadsnapshot: update matcher index properly while not holding lock. #4714
* [ENHANCEMENT] Logging improvements. #4113
* [ENHANCEMENT] Move query locking back into private query function. #4694
* [ENHANCEMENT] Optimize the new inhibitor implementation for ~2.5x performance improvement. #4668
* [ENHANCEMENT] Reduce the time dispatch.group holds the mutex. #4670
* [ENHANCEMENT] Use b.loop() to simplify the code and improve performance. #4642
* [ENHANCEMENT] Remove duplicate slice during silences query. #4696
* [ENHANCEMENT] Silences: optimize incremental mutes queries via a silence version index. #4723
* [ENHANCEMENT] Update description for filter param in openapi. #4775
* [BUGFIX] Add new behavior to avoid races on config reload. #4705
* [BUGFIX] config: Fix duplicate header detection for all case variants. #2810
* [BUGFIX] marker: Stop state leakage from aggregation groups. #4438
* [BUGFIX] Fix pprof debug endpoints not working with --web.route-prefix. #4698
* [BUGFIX] Set context timeout for resolvepeers. #4343