Allows to override the default timeout for API calls

[thomas-kl1]

At line https://github.com/fastly/fastly-magento2/blob/master/Model/Api.php#L1654 it would be interesting to be able to pass the timeout option, which the value could come from a config.

This would allow to import massive files (more than 10K lines in a edge dictionary via the import tool feature).

Currently we are facing an error because we reach the default 10s timeout from laminas adapter.