Seperated search indexing from database installation

[mnocon]

Needed for https://github.com/ibexa/visual-testing/pull/2 and tested there

For some reason the setup steps fails with:

  152/152 [============================] 100%
In App_KernelBehatDebugContainer.php line 3272:
                                                                               
  Warning: require(/var/www/var/cache/behat/ContainerBXxHz3B/getSwiftmailer_E  
  mailSender_ListenerService.php): failed to open stream: No such file or dir  
  ectory                                                                       
                                                                               

ibexa:install [--skip-indexing] [--siteaccess [SITEACCESS]] [-h|--help] [-q|--quiet] [-v|vv|vvv|--verbose] [-V|--version] [--ansi|--no-ansi] [-n|--no-interaction] [-e|--env ENV] [--no-debug] [--] [<type>]

(https://github.com/ibexa/visual-testing/actions/runs/3649183970/jobs/6164540855)

Which seems strange, because the file is for sure there - I think we're hitting the system limit of opened files and that's why it fails (not 100% sure TBH 🤔 )

Splitting the installation process into 2 steps: "pure DB install" and indexing helps with the issue, tested in:
https://github.com/ibexa/visual-testing/pull/2

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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