test: use regex for url checks

Updates tests to use a regex for URL checks instead of expecting the
URLs to equal the mocked value exactly. This will allow these tests to
pass both locally and against a real cluster with the MKI tests.

x-pack/test_serverless/functional/page_objects/svl_search_elasticsearch_start_page.ts

@@ -85,8 +85,8 @@ export function SvlSearchElasticsearchStartPageProvider({ getService }: FtrProvi
     },
     async expectO11yTrialLink() {
       await testSubjects.existOrFail('startO11yTrialBtn');
-      expect(await testSubjects.getAttribute('startO11yTrialBtn', 'href')).equal(
-        'https://fake-cloud.elastic.co/projects/create/observability/start'
+      expect(await testSubjects.getAttribute('startO11yTrialBtn', 'href')).match(
+        /^https?\:\/\/.*\/projects\/create\/observability\/start/
       );
       expect(await testSubjects.getAttribute('startO11yTrialBtn', 'target')).equal('_blank');
     },

x-pack/test_serverless/functional/page_objects/svl_search_index_detail_page.ts

@@ -27,8 +27,8 @@ export function SvlSearchIndexDetailPageProvider({ getService }: FtrProviderCont
     },
     async expectConnectionDetails() {
       await testSubjects.existOrFail('connectionDetailsEndpoint', { timeout: 2000 });
-      expect(await (await testSubjects.find('connectionDetailsEndpoint')).getVisibleText()).to.be(
-        'https://fakeprojectid.es.fake-domain.cld.elstc.co:443'
+      expect(await (await testSubjects.find('connectionDetailsEndpoint')).getVisibleText()).match(
+        /^https?\:\/\/.*(\:\d+)?/
       );
     },
     async expectQuickStats() {

x-pack/test_serverless/functional/test_suites/search/elasticsearch_start.ts

@@ -27,9 +27,6 @@ export default function ({ getPageObjects, getService }: FtrProviderContext) {
   };
 
   describe('Elasticsearch Start [Onboarding Empty State]', function () {
-    // fails on MKI, see https://github.com/elastic/kibana/issues/196981
-    this.tags(['failsOnMKI']);
-
     describe('developer', function () {
       before(async () => {
         await pageObjects.svlCommonPage.loginWithRole('developer');