feat: Adds bulk_invite api for onboarding view (#8931)

- New API for bulk email invite

app/javascript/dashboard/api/specs/agents.spec.js

@@ -10,4 +10,29 @@ describe('#AgentAPI', () => {
     expect(agents).toHaveProperty('update');
     expect(agents).toHaveProperty('delete');
   });
+
+  describe('API calls', () => {
+    const originalAxios = window.axios;
+    const axiosMock = {
+      post: jest.fn(() => Promise.resolve()),
+    };
+
+    beforeEach(() => {
+      window.axios = axiosMock;
+    });
+
+    afterEach(() => {
+      window.axios = originalAxios;
+    });
+
+    it('#bulkInvite', () => {
+      agents.bulkInvite({ emails: ['hello@hi.com'] });
+      expect(axiosMock.post).toHaveBeenCalledWith(
+        '/api/v1/agents/bulk_create',
+        {
+          emails: ['hello@hi.com'],
+        }
+      );
+    });
+  });
 });