[Migrations V2] Unskip migration_7.7.2_xpack_100k

[Bamieh]

Flaky Runner: https://kibana-ci.elastic.co/job/kibana+flaky-test-suite-runner/1687/

Findings:

The main error I was encountering is with the configs which is not related to the original flakiness issue.

 FAIL  src/core/server/saved_objects/migrationsv2/integration_tests/migration_7.7.2_xpack_100k.test.ts (297.903 s)
11:45:52  
11:45:52  
11:45:52    ● Test suite failed to run
11:45:52  
11:45:52      TypeError: Cannot read property 'append' of undefined
11:45:52  
11:45:52        52 |
11:45:52        53 |     for (const appender of this.appenders) {
11:45:52      > 54 |       appender.append(record);
11:45:52           |                ^
11:45:52        55 |     }
11:45:52        56 |   }
11:45:52        57 |
11:45:52  
11:45:52        at BaseLogger.log (src/core/server/logging/logger.ts:54:16)
11:45:52        at BaseLogger.info (src/core/server/logging/logger.ts:33:10)
11:45:52        at LoggerAdapter.info (src/core/server/logging/logger_adapter.ts:36:17)
11:45:52        at LevelLogger.info (x-pack/plugins/reporting/server/lib/level_logger.ts:58:26)
11:45:52        at backgroundInstall (x-pack/plugins/reporting/server/browsers/install.ts:50:12)

Original issue causing the error

TypeError: this.licenseService.stop is not a function
...

The main issue seems to be resolved here: #97144

The monitoring plugin now checks for this.licenseService.stop before calling the function so this flakiness should no longer happen.

I've ran the test 300 times (locally + via flaky test runner) so far and it seems that the issue is no longer occuring.

Closes #96895

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: b2f7513
• Storybooks Preview

Metrics [docs]

✅ unchanged

History

• 💚 Build #134531 succeeded 4650a1d
• 💔 Build #134506 failed ada5b43
• 💔 Build #134521 failed 57a57fc
• 💔 Build #134465 failed 6585a93
• 💔 Build #134462 failed 8374b55

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[kibanamachine]

💚 Backport successful

Status	Branch	Result
✅	7.x

This backport PR will be merged automatically after passing CI.