Fixes serverless feature flag org member navigation cards test (elast…

…ic#191896)

Closes elastic#191856

## Summary

Skips serverlesss observability project for the org members nav card.
This is a custom roles related feature, and custom roles do not apply to
observability projects at this time.


### Tests
-
x-pack/test_serverless/functional/test_suites/observability/config.feature_flags.ts
Note: will have to comment out the infra test file in the feature flag
index file in order to run
(x-pack/test_serverless/functional/test_suites/observability/index.feature_flags.ts
ln 12 `require.resolve('./infra'));`) See
elastic#191809.

x-pack/test_serverless/functional/test_suites/common/platform_security/navigation/management_nav_cards.ts

@@ -54,13 +54,16 @@ export default ({ getPageObjects, getService }: FtrProviderContext) => {
         expect(url).to.contain('/management/security/roles');
       });
 
-      it('displays the Organization members management card, and will navigate to the cloud organization URL', async () => {
-        await pageObjects.svlManagementPage.assertOrgMembersManagementCardExists();
-        await pageObjects.svlManagementPage.clickOrgMembersManagementCard();
+      describe('Organization members', function () {
+        this.tags('skipSvlOblt'); // Observability will not support custom roles
+        it('displays the Organization members management card, and will navigate to the cloud organization URL', async () => {
+          await pageObjects.svlManagementPage.assertOrgMembersManagementCardExists();
+          await pageObjects.svlManagementPage.clickOrgMembersManagementCard();
 
-        const url = await browser.getCurrentUrl();
-        // `--xpack.cloud.organization_url: '/account/members'`,
-        expect(url).to.contain('/account/members');
+          const url = await browser.getCurrentUrl();
+          // `--xpack.cloud.organization_url: '/account/members'`,
+          expect(url).to.contain('/account/members');
+        });
       });
 
       it('displays the spaces management card, and will navigate to the spaces management UI', async () => {
@@ -97,14 +100,17 @@ export default ({ getPageObjects, getService }: FtrProviderContext) => {
         await pageObjects.svlManagementPage.assertRoleManagementCardDoesNotExist();
       });
 
-      it('displays the organization members management card, and will navigate to the cloud organization URL', async () => {
-        // The org members nav card is always visible because there is no way to check if a user has approprite privileges
-        await pageObjects.svlManagementPage.assertOrgMembersManagementCardExists();
-        await pageObjects.svlManagementPage.clickOrgMembersManagementCard();
+      describe('Organization members', function () {
+        this.tags('skipSvlOblt'); // Observability will not support custom roles
+        it('displays the organization members management card, and will navigate to the cloud organization URL', async () => {
+          // The org members nav card is always visible because there is no way to check if a user has approprite privileges
+          await pageObjects.svlManagementPage.assertOrgMembersManagementCardExists();
+          await pageObjects.svlManagementPage.clickOrgMembersManagementCard();
 
-        const url = await browser.getCurrentUrl();
-        // `--xpack.cloud.organization_url: '/account/members'`,
-        expect(url).to.contain('/account/members');
+          const url = await browser.getCurrentUrl();
+          // `--xpack.cloud.organization_url: '/account/members'`,
+          expect(url).to.contain('/account/members');
+        });
       });
 
       it('should not display the spaces management card', async () => {