[Security Solution] unskip endpoint metering tests (#187431)

## Summary

unskip endpoint metering integration tests. passed 100/100 flaky test
runs.


### Checklist

- [x] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed


### 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)

x-pack/plugins/security_solution/public/management/cypress/e2e/serverless/metering.cy.ts

@@ -55,8 +55,7 @@ describe(
       stopTransparentApiProxy();
     });
 
-    // FLAKY: https://github.com/elastic/kibana/issues/187083
-    describe.skip('Usage Reporting Task', () => {
+    describe('Usage Reporting Task', () => {
       it('properly sends indexed heartbeats to the metering api', () => {
         const expectedChunks = Math.ceil(HEARTBEAT_COUNT / METERING_SERVICE_BATCH_SIZE);