Fix pending trait specs

Fixes pending trait specs for factories:

* `alert_management_alert`
* `prometheus_alert_event`
* `self_managed_prometheus_alert_event`

spec/factories/alert_management/alerts.rb

@@ -47,10 +47,6 @@ FactoryBot.define do
       hosts { [FFaker::Internet.ip_v4_address] }
     end
 
-    trait :with_ended_at do
-      ended_at { Time.current }
-    end
-
     trait :without_ended_at do
       ended_at { nil }
     end
@@ -67,7 +63,7 @@ FactoryBot.define do
 
     trait :resolved do
       status { AlertManagement::Alert.status_value(:resolved) }
-      with_ended_at
+      ended_at { Time.current }
     end
 
     trait :ignored do

spec/factories/prometheus_alert_event.rb

@@ -13,10 +13,5 @@ FactoryBot.define do
       ended_at { Time.now }
       payload_key { nil }
     end
-
-    trait :none do
-      status { nil }
-      started_at { nil }
-    end
   end
 end

spec/factories/self_managed_prometheus_alert_event.rb

@@ -8,16 +8,5 @@ FactoryBot.define do
     title { 'alert' }
     query_expression { 'vector(2)' }
     started_at { Time.now }
-
-    trait :resolved do
-      status { SelfManagedPrometheusAlertEvent.status_value_for(:resolved) }
-      ended_at { Time.now }
-      payload_key { nil }
-    end
-
-    trait :none do
-      status { nil }
-      started_at { nil }
-    end
   end
 end

spec/factories_spec.rb

@@ -7,7 +7,6 @@ RSpec.describe 'factories' do
 
   def skipped_traits
     [
-      [:alert_management_alert, :with_ended_at],
       [:audit_event, :unauthenticated],
       [:ci_build_trace_chunk, :fog_with_data],
       [:ci_job_artifact, :remote_store],
@@ -32,10 +31,7 @@ RSpec.describe 'factories' do
       [:pages_domain, :explicit_ecdsa],
       [:project_member, :blocked],
       [:project, :remote_mirror],
-      [:prometheus_alert_event, :none],
       [:remote_mirror, :ssh],
-      [:self_managed_prometheus_alert_event, :resolved],
-      [:self_managed_prometheus_alert_event, :none],
       [:user_preference, :only_comments]
     ]
   end

spec/models/prometheus_alert_event_spec.rb

@@ -52,7 +52,7 @@ RSpec.describe PrometheusAlertEvent do
       let(:started_at) { Time.current }
 
       context 'when status is none' do
-        subject { build(:prometheus_alert_event, :none) }
+        subject { build(:prometheus_alert_event, status: nil, started_at: nil) }
 
         it 'fires an event' do
           result = subject.fire(started_at)