[BUGFIX] Reconfigure and update typo3/class-alias-loader

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>