Always loading the alias loader is required in order to
allow extensions to provide class aliases in non Composer mode.

Also update the class alias loader to latest version with:

composer up typo3/class-alias-loader

By doing so, we can remove the additional composer dumpautoload
in test suite, which only was required because the alias loader
update requires a two step operation.

Resolves: #91692
Releases: master
Change-Id: Ie70ae295d14a5a813e294ae22a4e1bf10c8f0a5d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64933


Tested-by: Helmut Hummel <typo3@helhum.io>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Helmut Hummel <typo3@helhum.io>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>