No memory limit on install

[Quetzacoalt91]

When installing PS with all the languages (for instance on https://github.com/PrestaShop/docker-internal-images/), it appeared in the logs that we use too much memory to complete the installation.

To allow the docker images to be built properly, we temporarily apply a memory_limit=-1 for the installation script.

* Launching the installer script...
[91mPHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 106496 bytes) in /var/www/html/vendor/symfony/symfony/src/Symfony/Component/Translation/Loader/XliffFileLoader.php on line 253
[0m
[91mPHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 69632 bytes) in /var/www/html/vendor/symfony/symfony/src/Symfony/Component/Filesystem/Filesystem.php on line 165
[0m
Removing intermediate container e5bbea367397
The command '/bin/sh -c service mysql start && /tmp/docker_run.sh' returned a non-zero code: 255