fix(metric_alerts): Send metric_value to `handle_trigger_action` task (#19151)
fix(metric_alerts): Send metric_value to `handle_trigger_action` task (#19151)

Follow-up to https://github.com/getsentry/sentry/pull/19150. This starts sending the `metric_value`
param to the task. We can't land this until the parent pr is deployed.
beeftornado/sentry,beeftornado/sentry,beeftornado/sentry