[7.8] chore(NA): fix grunt task for test:coverage (#72539)

[mistic]

Backports the following commits to 7.8:

• chore(NA): fix grunt task for test:coverage (chore(NA): fix grunt task for test:coverage #72539)

[kibanamachine]

💛 Build succeeded, but was flaky

• continuous-integration/kibana-ci/pull-request
• Commit: d9e1a81
• Flaky suites:
  • xpack-kibana-ciGroup6

---

Test Failures

Kibana Pipeline / kibana-xpack-agent / X-Pack API Integration Tests.x-pack/test/api_integration/apis/fleet/setup·ts.apis Fleet Endpoints fleet_setup should create a fleet_enroll user and role

Link to Jenkins

Standard Out

Failed Tests Reporter:
  - Test has failed 5 times on tracked branches: https://github.com/elastic/kibana/issues/68568

[00:00:00]       │
[00:00:00]         └-: apis
[00:00:00]           └-> "before all" hook
[00:08:49]           └-: Fleet Endpoints
[00:08:49]             └-> "before all" hook
[00:09:34]             └-: fleet_setup
[00:09:34]               └-> "before all" hook
[00:09:34]               └-> should create a fleet_enroll user and role
[00:09:34]                 └-> "before each" hook: global before each
[00:09:34]                 └-> "before each" hook
[00:09:35]                 │ info [o.e.c.m.MetadataMappingService] [kibana-ci-immutable-debian-tests-xl-1595330484310359330] [.kibana_2/oIOEzXahQ0G227GB4e6kqA] update_mapping [_doc]
[00:09:35]                 │ info [o.e.c.m.MetadataMappingService] [kibana-ci-immutable-debian-tests-xl-1595330484310359330] [.kibana_2/oIOEzXahQ0G227GB4e6kqA] update_mapping [_doc]
[00:09:35]                 │ info [o.e.c.m.MetadataMappingService] [kibana-ci-immutable-debian-tests-xl-1595330484310359330] [.kibana_2/oIOEzXahQ0G227GB4e6kqA] update_mapping [_doc]
[00:09:35]                 │ info [o.e.c.m.MetadataMappingService] [kibana-ci-immutable-debian-tests-xl-1595330484310359330] [.kibana_2/oIOEzXahQ0G227GB4e6kqA] update_mapping [_doc]
[00:09:35]                 └- ✖ fail: "apis Fleet Endpoints fleet_setup should create a fleet_enroll user and role"
[00:09:35]                 │

Stack Trace

Error: expected 200 "OK", got 500 "Internal Server Error"
    at Test._assertStatus (/dev/shm/workspace/kibana/node_modules/supertest/lib/test.js:268:12)
    at Test._assertFunction (/dev/shm/workspace/kibana/node_modules/supertest/lib/test.js:283:11)
    at Test.assert (/dev/shm/workspace/kibana/node_modules/supertest/lib/test.js:173:18)
    at assert (/dev/shm/workspace/kibana/node_modules/supertest/lib/test.js:131:12)
    at /dev/shm/workspace/kibana/node_modules/supertest/lib/test.js:128:5
    at Test.Request.callback (/dev/shm/workspace/kibana/node_modules/superagent/lib/node/index.js:718:3)
    at parser (/dev/shm/workspace/kibana/node_modules/superagent/lib/node/index.js:906:18)
    at IncomingMessage.res.on (/dev/shm/workspace/kibana/node_modules/superagent/lib/node/parsers/json.js:19:7)
    at endReadableNT (_stream_readable.js:1145:12)
    at process._tickCallback (internal/process/next_tick.js:63:19)

---

Build metrics

✅ unchanged

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