Hi,
something in the moving of libraries (#17441) breaks the JInputCLI alias for CLI scripts.

Steps to reproduce the issue

Run a CLI script, it should find JInputCLI by invoking

$var = new JInputCLI();

Expected result

It finds JInputCLI.

Actual result

It does not find JInputCLI.
Application breaks.

I attach a test cli script (based on this script by Nicholas) that finds JInputCLI on a 3.7.4 and below but does not in 3.8.0 beta 1.

To run the the test, put the file in the cli folder of a joomla and run

php cli/jinputcli-test.php

I have found a workaround using this

      if (class_exists('JInputCLI'))
        {
          echo "JInputCLI exists\n";
          $this->input = new JInputCLI();
        }
        else
        {
          echo "JInputCLI does NOT exist\n";
          $this->input = new \Joomla\CMS\Input\Cli();
        }

Is this expected behaviour? Or do we have to include other class loader, on top of JLoader::import('joomla.application.cli') ?
If it is not expected, maybe other aliases are affected.