AWS S3 Adapter requires sockets and PCTNL extensions

[joshuaadickerson]

From this commit https://github.com/aws/aws-sdk-php/blob/3.69.0/composer.json they have required sockets and pctnl extensions for require-dev. This breaks tests because they are run in dev. This means this adapter now also requires those extensions.

You should cap the aws-sdk-php version at 3.68.1 for the current version and release a new major version of the adapter for the dependency changes.

[stof]

dev requirements are a root-only feature. The dev requirements of aws/aws-sdk-php has strictly no influence when requiring it as a dependency