Alerting docs: update `Configure notifications` (#97862)
* Update `Configure notifications`
* wip notification policies
* Finish Create Notification Policy
* Minor update to Contact point intro
* Fix `How label matching works` links and remove links from contact point intro
* Silences and Mute timings
* Reorder + MuteTimings + Silences
* Complete Create silence
* fix mispell
* Update docs/sources/alerting/configure-notifications/_index.md
Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>
* Update docs/sources/alerting/configure-notifications/_index.md
Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>
* Update docs/sources/alerting/configure-notifications/_index.md
Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>
* Update docs/sources/alerting/configure-notifications/_index.md
Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>
* fix prettier error
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Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>
(cherry picked from commit b8c4126fbc)
Co-authored-by: Pepe Cano <825430+ppcano@users.noreply.github.com>