The black line in the header appears

[yenienserrano]

Describe

After an installation the black line in the header is displayed

To Reproduce

1. Install Wazuh-dashboard
2. Log in to the dashboard and see the black bar

[yenienserrano]

I tried creating a base package and seeing if the opensearch_dashboards.yml that was added to the package was the correct one. It appears to be the correct one, so it may be that the correct openseach_dashboards.yml is not being used in the deb or rpm package build.

I would like to have more information about this file.
https://github.com/wazuh/wazuh-dashboard/blob/4.9.0/dev-tools/build-packages/config/wazuh-dashboard

[yenienserrano]

This configuration is added so that the tests continue working with the black header and the tests do not fail due to the change of the default value of the useExpandedHeader. This way all the tests will continue working

https://github.com/wazuh/wazuh-dashboard/pull/247/files#diff-30ec0975eb2551755774e06ced21f98234eb805022c951b9e4ce4688f50317d2R33