Add option to use AWS buckets for files in `--copy-files`

[vLia]

Is your feature request related to a problem? Please describe. During a discussion on copying files from host regarding issue #2216 it came up that we should allow aws buckets as well.

Describe the solution you'd like when reading the files, we should check if source string contains "amazonaws.com"

Additional context This ticket is a follow-up to https://github.com/kubeshop/testkube/issues/2216 and https://github.com/kubeshop/testkube/issues/2381