Move #auto_resolve_prometheus_alert to CE

Move `SystemNotes#IssuablesService#auto_resolve_prometheus_alert`
from EE to CE.

Contributes to migration of Prometheus alerts to Core

app/services/system_notes/issuables_service.rb

@@ -288,6 +288,12 @@ module SystemNotes
       create_note(NoteSummary.new(noteable, project, author, body, action: 'closed'))
     end
 
+    def auto_resolve_prometheus_alert
+      body = 'automatically closed this issue because the alert resolved.'
+
+      create_note(NoteSummary.new(noteable, project, author, body, action: 'closed'))
+    end
+
     private
 
     def cross_reference_note_content(gfm_reference)

ee/app/services/ee/system_notes/issuables_service.rb

@@ -44,12 +44,6 @@ module EE
 
         create_note(NoteSummary.new(noteable, project, author, body, action: 'weight'))
       end
-
-      def auto_resolve_prometheus_alert
-        body = 'automatically closed this issue because the alert resolved.'
-
-        create_note(NoteSummary.new(noteable, project, author, body, action: 'closed'))
-      end
     end
   end
 end

ee/spec/services/ee/system_notes/issuables_service_spec.rb

@@ -74,16 +74,4 @@ describe ::SystemNotes::IssuablesService do
       end
     end
   end
-
-  describe '#auto_resolve_prometheus_alert' do
-    subject { service.auto_resolve_prometheus_alert }
-
-    it_behaves_like 'a system note' do
-      let(:action) { 'closed' }
-    end
-
-    it 'creates the expected system note' do
-      expect(subject.note).to eq('automatically closed this issue because the alert resolved.')
-    end
-  end
 end

spec/services/system_notes/issuables_service_spec.rb

@@ -654,4 +654,16 @@ describe ::SystemNotes::IssuablesService do
           .to eq('resolved the corresponding error and closed the issue.')
     end
   end
+
+  describe '#auto_resolve_prometheus_alert' do
+    subject { service.auto_resolve_prometheus_alert }
+
+    it_behaves_like 'a system note' do
+      let(:action) { 'closed' }
+    end
+
+    it 'creates the expected system note' do
+      expect(subject.note).to eq('automatically closed this issue because the alert resolved.')
+    end
+  end
 end