Fix allow settings for maven duplicates

Prior to this change, there was an incorrect
usage of the checkbox and this caused the
test to be unable to check/uncheck properly

This change uses a button instead and the
button label to validate state. using check?
revealed a problem since it asserts for is-checked
attribute on the element being checked

app/assets/javascripts/packages_and_registries/settings/group/components/maven_settings.vue

@@ -79,12 +79,12 @@ export default {
     <form>
       <div class="gl-display-flex">
         <gl-toggle
-          data-qa-selector="allow_duplicates_checkbox"
+          data-qa-selector="allow_duplicates_toggle"
           :value="mavenDuplicatesAllowed"
           @change="update($options.modelNames.MAVEN_DUPLICATES_ALLOWED, $event)"
         />
         <div class="gl-ml-5">
-          <div data-testid="toggle-label">
+          <div data-testid="toggle-label" data-qa-selector="allow_duplicates_label">
             <gl-sprintf :message="enabledButtonLabel">
               <template #bold="{ content }">
                 <strong>{{ content }}</strong>

qa/qa/page/group/settings/package_registries.rb

@@ -12,18 +12,28 @@ module QA
           end
 
           view 'app/assets/javascripts/packages_and_registries/settings/group/components/maven_settings.vue' do
-            element :allow_duplicates_checkbox
+            element :allow_duplicates_toggle
+            element :allow_duplicates_label
           end
 
           def set_allow_duplicates_disabled
             expand_content :package_registry_settings_content do
-              uncheck_element :allow_duplicates_checkbox
+              click_element(:allow_duplicates_toggle) if duplicates_enabled?
             end
           end
 
-          def has_allow_duplicates_enabled?
-            expand_content :package_registry_settings_content
-            !find_element(:allow_duplicates_checkbox).checked?
+          def set_allow_duplicates_enabled
+            expand_content :package_registry_settings_content do
+              click_element(:allow_duplicates_toggle) if duplicates_disabled?
+            end
+          end
+
+          def duplicates_enabled?
+            has_element?(:allow_duplicates_label, text: 'Allow duplicates')
+          end
+
+          def duplicates_disabled?
+            has_element?(:allow_duplicates_label, text: 'Do not allow duplicates')
           end
         end
       end

qa/qa/specs/features/browser_ui/5_package/maven_repository_spec.rb

@@ -223,9 +223,7 @@ module QA
           project.group.visit!
 
           Page::Group::Menu.perform(&:go_to_package_settings)
-          Page::Group::Settings::PackageRegistries.perform do |settings|
-            expect(settings).to have_allow_duplicates_enabled
-          end
+          Page::Group::Settings::PackageRegistries.perform(&:set_allow_duplicates_enabled)
         end
 
         it 'allows users to publish duplicate Maven packages at the group level', testcase: 'https://gitlab.com/gitlab-org/quality/testcases/-/issues/1722' do