[Reporting] fix failing test: "user sees a job they've created"

resolves #246637
resolves #246638

I haven't made any changes, but I removed the skip and the test now
passes.

To re-run the tests locally now (group changed since last failure):

    node scripts/functional_tests --config x-pack/platform/test/serverless/functional/configs/security/config.group18.ts

Author: pmuellr

x-pack/platform/test/serverless/functional/test_suites/reporting/management.ts

@@ -38,9 +38,7 @@ export default ({ getPageObjects, getService }: FtrProviderContext) => {
     });
   };
 
-  // FLAKY: https://github.com/elastic/kibana/issues/246637
-  // FLAKY: https://github.com/elastic/kibana/issues/246638
-  describe.skip('Reporting Management app', () => {
+  describe('Reporting Management app', () => {
     let job: ReportApiJSON;
     let path: string;