[suggestion] Make service property available from AwsS3 adapter

[SumonMSelim]

I am using this bundle in a Symfony project to upload files to S3. For some debugging purposes and to know more information about the adapter I am using (S3), I need access to $service property.

But cannot do it at the moment as it's a protected property. Can we make a getter method to get this property?

I can send a pull request if needed.

[SumonMSelim]

I want to suggest one more thing: if we can add a configuration to enable/disable the bucket status check. In my case, I know the bucket is there. So, I don't need to check whether the bucket exists or not for every request.