Remove usages of pipeline.environments in specs

This pipeline.environments association creates cross-db queries, so
should be removed eventually

spec/models/merge_request_spec.rb

@@ -3524,7 +3524,7 @@ def set_compare(merge_request)
     let!(:job) { create(:ci_build, :with_deployment, :start_review_app, pipeline: pipeline, project: project) }
     it 'returns environments' do
-      is_expected.to eq(pipeline.environments)
+      is_expected.to eq(pipeline.environments_in_self_and_descendants.to_a)
       expect(subject.count).to be(1)
     end

spec/services/environments/stop_service_spec.rb

@@ -185,7 +185,7 @@
     end
     it 'has active environment at first' do
-      expect(pipeline.environments.first).to be_available
+      expect(pipeline.environments_in_self_and_descendants.first).to be_available
     end
     context 'when user is a developer' do
@@ -196,7 +196,7 @@
       it 'stops the active environment' do
         subject
-        expect(pipeline.environments.first).to be_stopped
+        expect(pipeline.environments_in_self_and_descendants.first).to be_stopped
       end
     end
@@ -208,7 +208,7 @@
       it 'does not stop the active environment' do
         subject
-        expect(pipeline.environments.first).to be_available
+        expect(pipeline.environments_in_self_and_descendants.first).to be_available
       end
     end
@@ -232,7 +232,7 @@
       it 'does not stop the active environment' do
         subject
-        expect(pipeline.environments.first).to be_available
+        expect(pipeline.environments_in_self_and_descendants.first).to be_available
       end
     end
   end