[FTR] Skipped alerting snooze test for FIPS (#208385)

## Summary

New test has been added for alerting in scope of this
[PR](https://github.com/elastic/kibana/pull/201508/files#diff-9d14ca1fb9743d33cb159a3b6e9c40161e3aaed85192082b09254964bf9101acR218).
We intentionally need to skip this test for FIPS due to [FIPS
overrides](542a56b482/packages/kbn-test/src/functional_tests/lib/fips_overrides.ts).

Added `skipFIPS` tag


### Checklist
- [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

x-pack/test/alerting_api_integration/spaces_only/tests/alerting/group4/snooze.ts

@@ -408,7 +408,8 @@ export default function createSnoozeRuleTests({ getService }: FtrProviderContext
       });
     });
 
-    describe('validation', () => {
+    describe('validation', function () {
+      this.tags('skipFIPS');
       it('should return 400 if the id is not in a valid format', async () => {
         const { body: createdRule } = await supertest
           .post(`${getUrlPrefix(Spaces.space1.id)}/api/alerting/rule`)