Drop support for AWS Version 1 cache resolver in v3?

[tacman]

Installing (composer install) shows this warning:

   Package amazonwebservices/aws-sdk-for-php is abandoned, you should avoid using it. Use aws/aws-sdk-php instead.

[tacman]

That warning exists only because of support for AWS Version 1 cache resolver. So this is more complicated than it looked at first glance. I'll keep poking at it.

[dbu]

i am not super familiar with AWS. can people use AWS with a newer version in this bundle and keep using version 1 for other things, or is that somehow a switch they have to flip? if users can mix api versions i see no problem in us dropping version 1 support in version 3.

[dbu]

there is additionally a phpstan warning that we have too many arguments. i ignore that for now but i think we should use 3.x to drop legacy things.