Add slot to delete button

And add tests for this, and default icon

app/assets/javascripts/design_management/components/delete_button.vue

@@ -98,6 +98,7 @@ export default {
       :loading="loading"
       :icon="buttonIcon"
       :disabled="isDeleting || !hasSelectedDesigns"
-    />
+      ><slot></slot
+    ></gl-button>
   </div>
 </template>

changelogs/unreleased/fix-design-management-archive-button.yml

+---
+title: Fix design management Archive Selected button label
+merge_request: 40325
+author:
+type: fixed

spec/frontend/design_management/components/delete_button_spec.js

@@ -8,7 +8,7 @@ describe('Batch delete button component', () => {
   const findButton = () => wrapper.find(GlButton);
   const findModal = () => wrapper.find(GlModal);
 
-  function createComponent(isDeleting = false) {
+  function createComponent({ isDeleting = false } = {}, { slots = {} } = {}) {
     wrapper = shallowMount(BatchDeleteButton, {
       propsData: {
         isDeleting,
@@ -16,6 +16,7 @@ describe('Batch delete button component', () => {
       directives: {
         GlModalDirective,
       },
+      slots,
     });
   }
 
@@ -31,7 +32,7 @@ describe('Batch delete button component', () => {
   });
 
   it('renders disabled button when design is deleting', () => {
-    createComponent(true);
+    createComponent({ isDeleting: true });
     expect(findButton().attributes('disabled')).toBeTruthy();
   });
 
@@ -48,4 +49,18 @@ describe('Batch delete button component', () => {
         expect(wrapper.emitted().deleteSelectedDesigns).toBeTruthy();
       });
   });
+
+  it('renders slot content', () => {
+    const testText = 'Archive selected';
+    createComponent(
+      {},
+      {
+        slots: {
+          default: testText,
+        },
+      },
+    );
+
+    expect(findButton().text()).toBe(testText);
+  });
 });