[ES|QL] Unskip remaining tests that no longer fail after #172220 (#172307)

## Summary

This PR unskips the remaining skipped tests that no longer fail after
the fix to ES|QL `time_zone` param in #172220.

Resolves #172247.
Resolves #172246.
Resolves #172248.

### Checklist

- [ ] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/packages/kbn-i18n/README.md)
- [ ]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [ ] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed
- [ ] Any UI touched in this PR is usable by keyboard only (learn more
about [keyboard accessibility](https://webaim.org/techniques/keyboard/))
- [ ] Any UI touched in this PR does not create any new axe failures
(run axe in browser:
[FF](https://addons.mozilla.org/en-US/firefox/addon/axe-devtools/),
[Chrome](https://chrome.google.com/webstore/detail/axe-web-accessibility-tes/lhdoppojpmngadmnindnejefpokejbdd?hl=en-US))
- [ ] If a plugin configuration key changed, check if it needs to be
allowlisted in the cloud and added to the [docker
list](https://github.com/elastic/kibana/blob/main/src/dev/build/tasks/os_packages/docker_generator/resources/base/bin/kibana-docker)
- [ ] This renders correctly on smaller devices using a responsive
layout. (You can test this [in your
browser](https://www.browserstack.com/guide/responsive-testing-on-local-server))
- [ ] This was checked for [cross-browser
compatibility](https://www.elastic.co/support/matrix#matrix_browsers)

### For maintainers

- [ ] This was checked for breaking API changes and was [labeled
appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

test/functional/apps/discover/group3/_view_mode_toggle.ts

@@ -28,8 +28,7 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
     defaultIndex: 'logstash-*',
   };
 
-  // FAILING ES PROMOTION: https://github.com/elastic/kibana/issues/172247
-  describe.skip('discover view mode toggle', function () {
+  describe('discover view mode toggle', function () {
     before(async () => {
       await security.testUser.setRoles(['kibana_admin', 'test_logstash_reader']);
       await esArchiver.loadIfNeeded('test/functional/fixtures/es_archiver/logstash_functional');

x-pack/test/functional/apps/discover/value_suggestions.ts

@@ -25,8 +25,7 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
     );
   }
 
-  // FAILING ES PROMOTION: https://github.com/elastic/kibana/issues/172248
-  describe.skip('value suggestions', function describeIndexTests() {
+  describe('value suggestions', function describeIndexTests() {
     before(async function () {
       await kibanaServer.savedObjects.cleanStandardList();
       await esArchiver.loadIfNeeded('x-pack/test/functional/es_archives/logstash_functional');
@@ -55,8 +54,7 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
         await PageObjects.common.navigateToApp('discover');
       });
 
-      // FLAKY: https://github.com/elastic/kibana/issues/172246
-      describe.skip('discover', () => {
+      describe('discover', () => {
         afterEach(async () => {
           await queryBar.clearQuery();
         });